/* ========================================================================
   九九欢乐麻将 · 官网样式 v4
   设计语言：壮乡山水国潮 · 桂林山水 × 牌九印章 × 壮锦纹样
   七节结构：Hero / 玩法 / 故事 / 特色 / 资质 / 资讯 / 下载
   ======================================================================== */

:root {
  /* —— 色彩：山水 + 墨金 + 朱砂 + 壮锦 —— */
  /* 山水（基底冷色）*/
  --sky: #4fc3f7;
  --sky-light: #b3e5fc;
  --sky-bright: #81d4fa;
  --sky-deep: #29b6f6;
  --water: #00bcd4;
  --water-light: #4dd0e1;

  /* 青山 */
  --jade: #4caf50;
  --jade-light: #66bb6a;
  --success: #52c41a;
  --mountain: #2e7d32;
  --mountain-deep: #1b5e20;

  /* 壮锦（国潮主色）*/
  --brocade-emerald: #2a8a6e;
  --brocade-emerald-deep: #1e6a52;
  --brocade-cinnabar: #b83227;
  --brocade-cinnabar-soft: #d4574a;

  /* 宣纸（暖底色）*/
  --paper-cream: #f8f0dc;
  --paper-cream-soft: #fdf6e3;
  --paper-cream-deep: #efe4c4;

  --ivory: #fafcfe;
  --paper: #f5f9fc;
  --paper-warm: #eaf3f8;
  --paper-blue: #ddeef7;

  /* 墨（文字主色）*/
  --ink: #0f2a35;
  --ink-soft: #1f4254;
  --ink-mute: #5a7384;
  --ink-faint: #8fa4b2;
  --ink-ink: #08222b;

  /* 线 */
  --line: #cfe2ec;
  --line-soft: #e2eef4;
  --line-strong: #a8c5d4;
  --line-warm: #d9c9a3;
  --line-warm-soft: #ecdfc0;

  /* 朱砂红（重点 / 招募）*/
  --cinnabar: #d32f2f;
  --cinnabar-dk: #b71c1c;
  --seal-red: #b11e1e;
  --seal-red-deep: #8c1717;

  /* 暖金 */
  --gold: #e6a23c;
  --gold-light: #f5d58a;
  --gold-deep: #c88a24;
  --gold-soft: #fbf1dc;
  --gold-pale: #fcebc4;

  /* 渐变 */
  --grad-gold: linear-gradient(135deg, #f5d58a 0%, #e6a23c 50%, #c88a24 100%);
  --grad-blue-gold: linear-gradient(
    135deg,
    #4fc3f7 0%,
    #29b6f6 50%,
    #c88a24 100%
  );
  --grad-cinnabar: linear-gradient(
    135deg,
    #d4574a 0%,
    #b11e1e 50%,
    #8c1717 100%
  );
  --grad-ink: linear-gradient(180deg, #08222b 0%, #0f2a35 50%, #1f4254 100%);

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(15, 42, 53, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 42, 53, 0.1);
  --shadow-lg: 0 16px 40px rgba(15, 42, 53, 0.15);
  --shadow-xl: 0 24px 60px rgba(15, 42, 53, 0.2);
  --shadow-gold: 0 8px 28px rgba(230, 162, 60, 0.3);
  --shadow-seal: 0 4px 16px rgba(177, 30, 30, 0.32);

  /* —— 字号 —— */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.375rem;
  --fs-2xl: 1.75rem;
  --fs-3xl: 2.25rem;
  --fs-4xl: 3rem;
  --fs-5xl: 4rem;
  --fs-6xl: 5rem;

  /* —— 间距 —— */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --sp-6: 2rem;
  --sp-7: 3rem;
  --sp-8: 4rem;
  --sp-9: 6rem;
  --sp-10: 8rem;
  --sp-11: 10rem;

  --container-max: 1240px;
  --header-h: 76px;

  /* —— 字体 —— */
  --font-zh-serif: "Noto Serif SC", "Songti SC", "STSong", "STKaiti", serif;
  --font-zh-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-en: "Cormorant Garamond", "Georgia", serif;
  --font-brush: "Ma Shan Zheng", "ZCOOL XiaoWei", "STKaiti", "KaiTi", serif;
  --font-display: "ZCOOL XiaoWei", "Noto Serif SC", serif;

  /* —— 缓动 —— */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-flip: cubic-bezier(0.68, -0.55, 0.27, 1.55);
}

/* ========================================================================
   重置
   ======================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: var(--header-h);
}

body {
  margin: 0;
  font-family: var(--font-zh-sans);
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--ink);
  background: var(--ivory);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img,
svg,
video {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s var(--ease);
}

button {
  font: inherit;
  cursor: pointer;
  background: none;
  border: 0;
  color: inherit;
}

a:focus-visible,
button:focus-visible,
.news-tab:focus-visible,
.nav-link:focus-visible,
.kf-tab:focus-visible {
  outline: 2px solid var(--gold-deep);
  outline-offset: 3px;
  border-radius: 2px;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-weight: 700;
  line-height: 1.35;
}
p {
  margin: 0;
}

::selection {
  background: var(--gold-light);
  color: var(--ink-ink);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--paper);
}
::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--brocade-emerald);
}

/* ========================================================================
   容器 & 揭示动画
   ======================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--sp-5);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.9s var(--ease-out),
    transform 0.9s var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-scale] {
  opacity: 0;
  transform: scale(0.92);
  transition:
    opacity 0.9s var(--ease-out),
    transform 0.9s var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal-scale].revealed {
  opacity: 1;
  transform: scale(1);
}

[data-reveal-flip] {
  opacity: 0;
  transform: perspective(800px) rotateY(90deg);
  transition:
    opacity 0.9s var(--ease-out),
    transform 0.9s var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  transform-origin: center center;
}
[data-reveal-flip].revealed {
  opacity: 1;
  transform: perspective(800px) rotateY(0);
}

/* 装饰系统：印章 */
.seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: var(--seal-red);
  color: var(--paper-cream);
  font-family: var(--font-zh-serif);
  font-size: 0.875rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  text-align: center;
  line-height: 1.1;
  border-radius: 4px;
  box-shadow: var(--shadow-seal);
  position: relative;
  transform: rotate(-4deg);
  flex-shrink: 0;
}
.seal::before {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px solid rgba(248, 240, 220, 0.5);
  border-radius: 2px;
  pointer-events: none;
}
.seal-lg {
  width: 72px;
  height: 72px;
  font-size: 1.125rem;
}
.seal-sm {
  width: 40px;
  height: 40px;
  font-size: 0.75rem;
}

/* 装饰系统：折扇 divider */
.fan-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
  margin: var(--sp-7) 0;
  color: var(--gold-deep);
}
.fan-divider::before,
.fan-divider::after {
  content: "";
  flex: 1;
  max-width: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold) 50%, transparent);
}
.fan-divider svg {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 4px rgba(200, 138, 36, 0.25));
}

/* 装饰系统：壮锦纹样（CSS repeating background）*/
.brocade-bg {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'><g fill='none' stroke='%232A8A6E' stroke-width='0.8' opacity='0.18'><path d='M30 5 L55 30 L30 55 L5 30 Z'/><path d='M30 15 L45 30 L30 45 L15 30 Z'/><circle cx='30' cy='30' r='4' fill='%23B83227' opacity='0.4'/><path d='M0 30 H10 M50 30 H60 M30 0 V10 M30 50 V60' stroke='%23B11E1E' stroke-width='0.6' opacity='0.5'/></g></svg>");
  background-size: 60px 60px;
  background-repeat: repeat;
}

.brocade-bg-cinnabar {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 40 40'><g fill='none' stroke='%23B11E1E' stroke-width='0.7' opacity='0.16'><path d='M20 4 L36 20 L20 36 L4 20 Z'/><circle cx='20' cy='20' r='2.5' fill='%23B11E1E' opacity='0.4'/></g></svg>");
  background-size: 40px 40px;
}

/* 装饰系统：卷轴底纹 */
.scroll-pattern {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='40' viewBox='0 0 200 40'><g fill='none' stroke='%23C88A24' stroke-width='0.5' opacity='0.12'><path d='M0 20 Q50 10 100 20 T200 20'/><path d='M0 24 Q50 14 100 24 T200 24'/></g></svg>");
  background-size: 200px 40px;
  background-repeat: repeat;
}

/* Section header 统一 */
.section-head {
  text-align: center;
  margin-bottom: var(--sp-9);
  position: relative;
}
.section-head-row {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-4);
  margin-bottom: var(--sp-5);
}
.section-head-seal {
  font-size: 0;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: var(--fs-xs);
  letter-spacing: 0.4em;
  color: var(--ink-mute);
  font-family: var(--font-en);
  font-weight: 500;
}
.section-eyebrow-cn {
  font-family: var(--font-zh-serif);
  color: var(--seal-red);
  letter-spacing: 0.3em;
  font-weight: 700;
}
.section-eyebrow-en {
  color: var(--ink-faint);
  font-family: var(--font-en);
}
.section-eyebrow::before,
.section-eyebrow::after {
  content: "";
  width: 32px;
  height: 1.5px;
  background: var(--grad-gold);
  border-radius: 1px;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.1em;
  margin-bottom: var(--sp-3);
  font-size: clamp(2rem, 4vw, var(--fs-4xl));
  position: relative;
  display: inline-block;
}
.section-head .section-title::after {
  content: "";
  display: block;
  width: 48px;
  height: 3px;
  margin: var(--sp-3) auto 0;
  background: var(--grad-gold);
  border-radius: 2px;
}

.section-sub {
  font-size: var(--fs-base);
  color: var(--ink-mute);
  letter-spacing: 0.1em;
  margin-top: var(--sp-3);
}
.section-sub strong {
  color: var(--seal-red);
  font-weight: 600;
}

/* ========================================================================
   导航栏
   ======================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(250, 252, 254, 0.82);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition:
    background 0.3s var(--ease),
    border-color 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}
.site-header.scrolled {
  background: rgba(250, 252, 254, 0.96);
  border-bottom-color: var(--line);
  box-shadow: 0 4px 24px rgba(15, 42, 53, 0.06);
}

.nav-inner {
  height: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--sp-5);
  display: flex;
  align-items: center;
  gap: var(--sp-5);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-shrink: 0;
}
.brand img {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(200, 138, 36, 0.25);
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand-title {
  font-family: var(--font-zh-serif);
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.05em;
}
.brand-sub {
  font-family: var(--font-en);
  font-size: 0.625rem;
  letter-spacing: 0.3em;
  color: var(--ink-mute);
  margin-top: 2px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
  margin-left: auto;
}
.nav-link {
  position: relative;
  font-size: var(--fs-sm);
  color: var(--ink-mute);
  letter-spacing: 0.15em;
  padding: 0.5rem 0;
  transition: color 0.25s var(--ease);
  font-weight: 500;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--grad-gold);
  transition:
    width 0.3s var(--ease),
    left 0.3s var(--ease);
}
.nav-link:hover {
  color: var(--ink);
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 28px;
  left: calc(50% - 14px);
}
.nav-link.active {
  color: var(--ink);
  font-weight: 600;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.3rem;
  font-size: var(--fs-sm);
  color: var(--paper-cream);
  background: var(--grad-cinnabar);
  border: 1px solid var(--gold);
  border-radius: 4px;
  letter-spacing: 0.15em;
  font-weight: 600;
  font-family: var(--font-zh-serif);
  position: relative;
  overflow: hidden;
  transition:
    transform 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}
.nav-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.4),
    transparent
  );
  transition: left 0.6s var(--ease);
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(177, 30, 30, 0.35);
}
.nav-cta:hover::before {
  left: 100%;
}

.hamburger {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  margin-left: auto;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  transition:
    transform 0.3s var(--ease),
    opacity 0.3s var(--ease);
}
.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
}
.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ========================================================================
   §1 Hero 壮韵开局
   ======================================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-h);
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}
.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  animation: hero-zoom 30s ease-in-out infinite alternate;
}
@keyframes hero-zoom {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.08);
  }
}
.hero-bg-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(
      180deg,
      rgba(245, 249, 252, 0.4) 0%,
      rgba(245, 249, 252, 0.25) 40%,
      rgba(245, 249, 252, 0.92) 100%
    ),
    linear-gradient(
      90deg,
      rgba(248, 240, 220, 0.75) 0%,
      rgba(248, 240, 220, 0.35) 50%,
      rgba(248, 240, 220, 0.2) 100%
    );
  pointer-events: none;
}

/* 顶部金色横线 */
.hero-top-line {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--grad-gold);
  z-index: 2;
}

/* 卷轴底纹 */
.hero-scroll-pattern {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='40' viewBox='0 0 200 40'><g fill='none' stroke='%23C88A24' stroke-width='0.5' opacity='0.10'><path d='M0 20 Q50 10 100 20 T200 20'/></g></svg>");
  background-size: 200px 40px;
  background-repeat: repeat;
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding: var(--sp-8) var(--sp-5) var(--sp-9);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--sp-8);
  align-items: center;
  position: relative;
  z-index: 3;
}

.hero-main {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  gap: var(--sp-5);
}

.hero-seal {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 0.5rem 1rem 0.5rem 0.5rem;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--line);
  border-radius: 100px;
  backdrop-filter: blur(8px);
  font-size: var(--fs-sm);
  color: var(--ink);
  letter-spacing: 0.1em;
  font-family: var(--font-zh-serif);
  font-weight: 600;
}
.hero-seal .seal-sm {
  width: 28px;
  height: 28px;
  font-size: 0.625rem;
}
.hero-seal-text {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.2;
}
.hero-seal-text small {
  font-size: 0.625rem;
  color: var(--ink-mute);
  font-family: var(--font-en);
  letter-spacing: 0.2em;
}

.hero-logo-wrap {
  display: inline-block;
  margin: var(--sp-3) 0;
  filter: drop-shadow(0 16px 48px rgba(15, 42, 53, 0.3))
    drop-shadow(0 0 32px rgba(230, 162, 60, 0.22));
}
.hero-logo {
  display: block;
  max-width: min(620px, 90%);
  width: auto;
  height: auto;
}

.hero-slogan {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-bottom: var(--sp-2);
}
.hero-slogan-cn {
  font-family: var(--font-brush);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  color: var(--ink);
  letter-spacing: 0.2em;
  font-weight: 400;
  display: inline-flex;
  align-items: baseline;
  gap: var(--sp-3);
}
.hero-slogan-cn em {
  color: var(--seal-red);
  font-style: normal;
  font-family: var(--font-zh-serif);
  font-weight: 700;
}
.hero-slogan-en {
  font-family: var(--font-en);
  font-size: var(--fs-sm);
  color: var(--ink-mute);
  letter-spacing: 0.3em;
  font-weight: 400;
  font-style: italic;
  margin-top: var(--sp-1);
}

.hero-cta {
  display: flex;
  gap: var(--sp-3);
  flex-wrap: wrap;
  margin: var(--sp-3) 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.85rem 1.6rem;
  background: var(--ink);
  color: var(--ivory);
  border-radius: 4px;
  transition:
    transform 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
  border: 0;
  font-weight: 500;
  position: relative;
  overflow: hidden;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(15, 42, 53, 0.18);
}
.btn-large {
  padding: 1rem 1.8rem;
}
.btn-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  text-align: left;
}
.btn-mini {
  font-size: 0.625rem;
  letter-spacing: 0.15em;
  opacity: 0.75;
}
.btn-big {
  font-size: var(--fs-base);
  font-weight: 700;
  letter-spacing: 0.05em;
  font-family: var(--font-zh-serif);
  margin-top: 2px;
}
.btn-ios {
  background: linear-gradient(135deg, #1f4254 0%, #0f2a35 100%);
  color: var(--paper-cream);
}
.btn-ios:hover {
  box-shadow: 0 10px 28px rgba(31, 66, 84, 0.45);
}
.btn-android {
  background: var(--grad-gold);
  color: var(--ink-ink);
  border: 1px solid var(--gold-deep);
}
.btn-android:hover {
  box-shadow: var(--shadow-gold);
}
.btn-wechat {
  background: var(--grad-cinnabar);
  color: var(--paper-cream);
  border: 1px solid var(--gold);
}
.btn-wechat:hover {
  box-shadow: 0 10px 28px rgba(177, 30, 30, 0.35);
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-3);
  margin-top: var(--sp-2);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 1rem;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--jade);
  border-radius: 100px;
  font-size: var(--fs-sm);
  color: var(--ink);
  letter-spacing: 0.1em;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-weight: 500;
  transition:
    transform 0.25s var(--ease),
    border-color 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}
.hero-badge:hover {
  transform: translateY(-2px);
  border-color: var(--gold);
  box-shadow: 0 6px 16px rgba(230, 162, 60, 0.22);
}
.hero-badge-ico {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--jade);
  color: var(--paper-cream);
  flex-shrink: 0;
}
.hero-badge-ico svg {
  width: 10px;
  height: 10px;
  display: block;
}
.hero-badge-txt {
  font-weight: 600;
}

/* Hero 右侧 QR 卡片 */
.hero-side {
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-qr-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-6) var(--sp-5) var(--sp-5);
  background: rgba(255, 255, 255, 0.95);
  border: 2px solid var(--gold);
  border-radius: 8px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow:
    0 20px 50px rgba(15, 42, 53, 0.2),
    0 0 0 8px rgba(230, 162, 60, 0.08);
  min-width: 220px;
  transform: rotate(-1deg);
}
.hero-qr-card::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 6px;
  right: 6px;
  bottom: 6px;
  border: 1px solid var(--gold);
  border-radius: 4px;
  pointer-events: none;
}
.hero-qr-corner {
  position: absolute;
  width: 28px;
  height: 28px;
  border: 2px solid var(--seal-red);
  pointer-events: none;
}
.hero-qr-corner.tl {
  top: -2px;
  left: -2px;
  border-right: 0;
  border-bottom: 0;
}
.hero-qr-corner.tr {
  top: -2px;
  right: -2px;
  border-left: 0;
  border-bottom: 0;
}
.hero-qr-corner.bl {
  bottom: -2px;
  left: -2px;
  border-right: 0;
  border-top: 0;
}
.hero-qr-corner.br {
  bottom: -2px;
  right: -2px;
  border-left: 0;
  border-top: 0;
}
.hero-qr-frame {
  width: 180px;
  height: 180px;
  padding: 10px;
  background: var(--paper-cream);
  border-radius: 4px;
  border: 1px solid var(--line-warm);
}
.hero-qr-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.hero-qr-zh {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--seal-red);
  letter-spacing: 0.3em;
  margin-top: var(--sp-2);
}
.hero-qr-en {
  font-family: var(--font-en);
  font-size: 0.6875rem;
  color: var(--ink-mute);
  letter-spacing: 0.3em;
  margin-top: -2px;
}
.hero-qr-card .seal {
  position: absolute;
  top: -22px;
  right: -16px;
  width: 60px;
  height: 60px;
  font-size: 0.875rem;
}

/* 滚动指示 */
.scroll-indicator {
  position: absolute;
  bottom: var(--sp-5);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
  color: var(--ink-mute);
  z-index: 4;
}
.scroll-text {
  font-family: var(--font-en);
  font-size: 0.625rem;
  letter-spacing: 0.4em;
}
.scroll-arrow {
  display: block;
  width: 14px;
  height: 14px;
  border-right: 1.5px solid var(--ink-mute);
  border-bottom: 1.5px solid var(--ink-mute);
  transform: rotate(45deg);
  animation: scroll-bounce 1.6s ease-in-out infinite;
}
@keyframes scroll-bounce {
  0%,
  100% {
    transform: rotate(45deg) translate(0, 0);
    opacity: 0.5;
  }
  50% {
    transform: rotate(45deg) translate(-3px, -3px);
    opacity: 1;
  }
}

/* ========================================================================
   §2 玩法三艺
   ======================================================================== */
.modes {
  position: relative;
  background: linear-gradient(
    180deg,
    var(--paper-cream-soft) 0%,
    var(--paper) 100%
  );
  padding: var(--sp-10) 0;
  overflow: hidden;
  isolation: isolate;
}
.modes::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: url("../img/modes-illustration.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.18;
}
.modes::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(
    180deg,
    var(--paper-cream-soft) 0%,
    rgba(255, 255, 255, 0.6) 30%,
    var(--paper) 100%
  );
}

.modes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
  margin-top: var(--sp-7);
}

.mode-card {
  position: relative;
  background: var(--ivory);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: var(--sp-7) var(--sp-5) var(--sp-6);
  text-align: center;
  overflow: hidden;
  cursor: pointer;
  transition:
    transform 0.5s var(--ease),
    box-shadow 0.5s var(--ease),
    border-color 0.3s var(--ease);
  isolation: isolate;
}
/* 整张卡可点击的 stretched link：覆盖全卡，点击跳转到 #cta */
.mode-card-link {
  position: absolute;
  inset: 0;
  z-index: 2;
  border-radius: inherit;
  text-indent: -9999px;
  overflow: hidden;
}
.mode-card-link:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
  border-radius: 8px;
}
.mode-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--grad-gold);
  z-index: 1;
}
.mode-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 80 80'><g fill='none' stroke='%23C88A24' stroke-width='0.5' opacity='0.06'><path d='M40 10 L70 40 L40 70 L10 40 Z'/><circle cx='40' cy='40' r='3' fill='%23B11E1E' opacity='0.2'/></g></svg>");
  background-size: 80px 80px;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
}
.mode-card > *:not(.mode-card-link) {
  position: relative;
  z-index: 1;
}
.mode-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 48px rgba(15, 42, 53, 0.16);
  border-color: var(--gold);
}

.mode-card-tile {
  width: 80px;
  height: 100px;
  margin: 0 auto var(--sp-5);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, var(--paper-cream) 0%, #f5e5b8 100%);
  border-radius: 8px;
  box-shadow:
    0 6px 16px rgba(15, 42, 53, 0.15),
    inset 0 0 0 1px var(--gold-soft);
  font-family: var(--font-display);
  font-weight: 700;
  transition: transform 0.6s var(--ease-flip);
  transform-style: preserve-3d;
}
.mode-card:hover .mode-card-tile {
  transform: rotateY(180deg);
}
.mode-card-tile-front,
.mode-card-tile-back {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  backface-visibility: hidden;
}
.mode-card-tile-back {
  background: var(--grad-cinnabar);
  color: var(--paper-cream);
  transform: rotateY(180deg);
  font-family: var(--font-zh-serif);
  font-size: var(--fs-sm);
  letter-spacing: 0.15em;
}
.mode-card-tile-front {
  font-size: 2.5rem;
  color: var(--ink-ink);
}
.mode-card-tile-front .suit-wan {
  color: var(--seal-red);
}
.mode-card-tile-front .suit-tong {
  color: var(--brocade-emerald-deep);
}
.mode-card-tile-front .suit-tiao {
  color: var(--sky-deep);
}

.mode-card-cat {
  display: inline-block;
  padding: 2px 12px;
  font-family: var(--font-zh-serif);
  font-size: var(--fs-xs);
  color: var(--seal-red);
  border: 1px solid var(--seal-red);
  border-radius: 100px;
  letter-spacing: 0.2em;
  margin-bottom: var(--sp-3);
  background: rgba(177, 30, 30, 0.04);
}
.mode-card-title {
  font-family: var(--font-zh-serif);
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.1em;
  margin-bottom: var(--sp-3);
}
.mode-card-desc {
  font-size: var(--fs-sm);
  color: var(--ink-soft);
  line-height: 1.9;
  margin-bottom: var(--sp-4);
  letter-spacing: 0.05em;
}
.mode-card-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  padding-top: var(--sp-4);
  border-top: 1px dashed var(--line);
  text-align: left;
}
.mode-card-list li {
  font-size: var(--fs-sm);
  color: var(--ink-mute);
  line-height: 1.7;
  padding-left: var(--sp-4);
  position: relative;
}
.mode-card-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  background: var(--gold);
  border-radius: 50%;
}
.mode-card-quote {
  margin-top: var(--sp-5);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-brush);
  font-size: var(--fs-base);
  color: var(--seal-red);
  letter-spacing: 0.2em;
  text-align: center;
  position: relative;
}
.mode-card-quote::before,
.mode-card-quote::after {
  content: "·";
  margin: 0 var(--sp-2);
  color: var(--gold);
}

/* ========================================================================
   §3 故事壮韵传承
   ======================================================================== */
.story {
  position: relative;
  padding: var(--sp-10) 0;
  overflow: hidden;
  isolation: isolate;
  background: var(--ivory);
}
.story-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}
.story-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.15;
}
.story-bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.95) 0%,
    rgba(255, 255, 255, 0.65) 50%,
    rgba(255, 255, 255, 0.35) 100%
  );
}

.story-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-8);
  align-items: center;
  position: relative;
  z-index: 1;
}

.story-content {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--line);
  border-left: 4px solid var(--seal-red);
  border-radius: 4px;
  padding: var(--sp-7);
  box-shadow: var(--shadow-md);
  position: relative;
}
.story-content::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 60px;
  background: var(--grad-gold);
  border-bottom-left-radius: 60px;
  opacity: 0.12;
}
.story-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-zh-serif);
  font-size: var(--fs-xs);
  color: var(--seal-red);
  letter-spacing: 0.3em;
  margin-bottom: var(--sp-4);
  font-weight: 600;
}
.story-eyebrow::before {
  content: "";
  width: 24px;
  height: 1.5px;
  background: var(--seal-red);
}
.story-title {
  font-family: var(--font-display);
  font-size: clamp(1.875rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.1em;
  margin-bottom: var(--sp-5);
  line-height: 1.35;
}
.story-title em {
  color: var(--seal-red);
  font-style: normal;
}
.story-text {
  font-family: var(--font-zh-serif);
  font-size: var(--fs-base);
  color: var(--ink-soft);
  line-height: 2;
  margin-bottom: var(--sp-4);
  letter-spacing: 0.05em;
}
.story-text strong {
  color: var(--seal-red);
  font-weight: 700;
}
.story-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-4);
  margin-top: var(--sp-6);
  padding-top: var(--sp-5);
  border-top: 1px dashed var(--line);
}
.story-stat {
  text-align: center;
}
.story-stat-num {
  font-family: var(--font-display);
  font-size: var(--fs-3xl);
  font-weight: 700;
  color: var(--seal-red);
  letter-spacing: 0.05em;
  line-height: 1;
}
.story-stat-num small {
  font-size: var(--fs-base);
  color: var(--ink-mute);
  font-family: var(--font-zh-serif);
  margin-left: 2px;
  font-weight: 500;
}
.story-stat-label {
  font-size: var(--fs-xs);
  color: var(--ink-mute);
  letter-spacing: 0.2em;
  margin-top: var(--sp-2);
  font-family: var(--font-zh-serif);
}

.story-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 480px;
}
.story-image-frame {
  position: relative;
  width: 100%;
  max-width: 540px;
  aspect-ratio: 4 / 3;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  transform: rotate(1.5deg);
  transition: transform 0.6s var(--ease);
}
.story-image-frame:hover {
  transform: rotate(0deg);
}
.story-image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.story-image-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 8px solid transparent;
  border-image: linear-gradient(
      135deg,
      var(--gold-light),
      var(--gold),
      var(--gold-deep)
    )
    1;
  pointer-events: none;
  z-index: 1;
}
.story-image-seal {
  position: absolute;
  bottom: -20px;
  right: -20px;
  z-index: 2;
  transform: rotate(-8deg);
}

/* ========================================================================
   §4 特色安心开局
   ======================================================================== */
.features {
  position: relative;
  padding: var(--sp-10) 0;
  background: linear-gradient(
    180deg,
    var(--ivory) 0%,
    var(--paper-cream-soft) 100%
  );
  overflow: hidden;
}
.features::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='100' height='100' viewBox='0 0 100 100'><g fill='none' stroke='%232A8A6E' stroke-width='0.6' opacity='0.08'><path d='M50 10 L90 50 L50 90 L10 50 Z'/><circle cx='50' cy='50' r='6' fill='none'/><circle cx='50' cy='50' r='2' fill='%23B11E1E' opacity='0.3'/></g></svg>");
  background-size: 100px 100px;
  pointer-events: none;
}

.features-timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: var(--sp-7) 0;
}
.features-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  background: linear-gradient(
    180deg,
    transparent 0%,
    var(--gold) 10%,
    var(--seal-red) 50%,
    var(--gold) 90%,
    transparent 100%
  );
  z-index: 0;
}

.feature-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-7);
  align-items: center;
  margin-bottom: var(--sp-8);
  z-index: 1;
}
.feature-item:nth-child(even) .feature-card {
  grid-column: 2;
  grid-row: 1;
}
.feature-item:nth-child(even) .feature-spacer {
  grid-column: 1;
  grid-row: 1;
}

.feature-dot {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--seal-red);
  box-shadow:
    0 0 0 6px var(--ivory),
    0 0 0 8px var(--gold);
  z-index: 2;
}
.feature-dot::after {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--paper-cream);
}

.feature-card {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  padding: var(--sp-6);
  background: var(--ivory);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: var(--shadow-md);
  position: relative;
  transition:
    transform 0.4s var(--ease),
    box-shadow 0.4s var(--ease);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--gold);
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--grad-gold);
  border-radius: 2px;
}
.feature-item:nth-child(odd) .feature-card::before {
  right: -1px;
}
.feature-item:nth-child(even) .feature-card::before {
  left: -1px;
}

.feature-num {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  color: var(--gold-deep);
  font-weight: 700;
  letter-spacing: 0.1em;
}
.feature-head {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}
.feature-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--paper-cream);
  border: 1px solid var(--gold);
  border-radius: 6px;
  color: var(--seal-red);
  flex-shrink: 0;
}
.feature-icon svg {
  width: 22px;
  height: 22px;
}
.feature-title {
  font-family: var(--font-zh-serif);
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.1em;
}
.feature-desc {
  font-family: var(--font-zh-serif);
  font-size: var(--fs-base);
  color: var(--ink-soft);
  line-height: 1.9;
  letter-spacing: 0.05em;
}
.feature-spacer {
  display: block;
}

/* ========================================================================
   §5 资质信任墙
   ======================================================================== */
.credentials {
  position: relative;
  padding: var(--sp-10) 0;
  background: linear-gradient(
    180deg,
    var(--paper-cream-soft) 0%,
    var(--ivory) 100%
  );
  overflow: hidden;
}
.credentials::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'><g fill='none' stroke='%23C88A24' stroke-width='0.5' opacity='0.10'><path d='M30 8 L52 30 L30 52 L8 30 Z'/></g></svg>");
  background-size: 60px 60px;
  pointer-events: none;
}

.credentials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
  margin-top: var(--sp-7);
}

.cred-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: linear-gradient(
    160deg,
    var(--paper-cream-soft) 0%,
    var(--ivory) 100%
  );
  border: 1px solid var(--line-warm);
  border-radius: 6px;
  padding: var(--sp-6) var(--sp-5);
  text-align: center;
  overflow: hidden;
  transition:
    transform 0.4s var(--ease),
    box-shadow 0.4s var(--ease);
  isolation: isolate;
}
.cred-card::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid var(--gold-light);
  border-radius: 4px;
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}
.cred-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    transparent 60%,
    rgba(230, 162, 60, 0.1) 100%
  );
  pointer-events: none;
  z-index: 0;
  opacity: 0;
  transition: opacity 0.4s var(--ease);
}
.cred-card > * {
  position: relative;
  z-index: 1;
}
.cred-card:hover {
  transform: translateY(-4px);
  box-shadow:
    0 16px 40px rgba(15, 42, 53, 0.15),
    0 0 0 1px var(--gold);
}
.cred-card:hover::after {
  opacity: 1;
}

.cred-badge {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--sp-4);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--grad-gold);
  color: var(--ink-ink);
  border-radius: 50%;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  box-shadow:
    0 6px 16px rgba(230, 162, 60, 0.35),
    inset 0 0 0 2px rgba(255, 255, 255, 0.4);
}
.cred-title {
  font-family: var(--font-zh-serif);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.1em;
  margin-bottom: var(--sp-2);
  line-height: 1.4;
}
.cred-desc {
  font-size: var(--fs-sm);
  color: var(--ink-soft);
  line-height: 1.8;
  margin-bottom: var(--sp-4);
  letter-spacing: 0.05em;
}
.cred-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: var(--sp-3);
  border-top: 1px dashed var(--line-warm);
  font-size: var(--fs-xs);
  color: var(--ink-mute);
  letter-spacing: 0.1em;
}
.cred-stamp {
  width: 32px;
  height: 32px;
  background: var(--seal-red);
  color: var(--paper-cream);
  border-radius: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-zh-serif);
  font-size: 0.625rem;
  font-weight: 700;
  transform: rotate(-8deg);
  opacity: 0.7;
}

/* ========================================================================
   §6 资讯公告
   ======================================================================== */
.news {
  background: linear-gradient(180deg, var(--ivory) 0%, var(--paper) 100%);
  padding: var(--sp-10) 0;
}

.news-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  border-bottom: 1px solid var(--line);
  margin-bottom: var(--sp-7);
}
.news-tab {
  position: relative;
  padding: var(--sp-3) var(--sp-5);
  font-size: var(--fs-base);
  color: var(--ink-mute);
  letter-spacing: 0.2em;
  transition: color 0.25s var(--ease);
  font-family: var(--font-zh-serif);
  font-weight: 500;
}
.news-tab::after {
  content: "";
  position: absolute;
  left: var(--sp-4);
  right: var(--sp-4);
  bottom: -1px;
  height: 2px;
  background: var(--grad-gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.news-tab:hover {
  color: var(--ink);
}
.news-tab.active {
  color: var(--ink);
  font-weight: 600;
}
.news-tab.active::after {
  transform: scaleX(1);
}

.news-list {
  display: flex;
  flex-direction: column;
  max-width: 960px;
  margin-inline: auto;
}

.news-row {
  position: relative;
  display: grid;
  grid-template-columns: 90px 72px 1fr auto;
  align-items: center;
  gap: var(--sp-5);
  padding: var(--sp-5) var(--sp-4);
  border-bottom: 1px solid var(--line-soft);
  transition: transform 0.3s var(--ease);
}
.news-row:first-child {
  border-top: 1px solid var(--line-soft);
}
/* 悬浮胶囊：完全在行内部，左右各留 8px 呼吸空间，圆角自然 */
.news-row::before {
  content: "";
  position: absolute;
  inset: 4px 8px;
  background: linear-gradient(
    90deg,
    var(--paper-blue) 0%,
    var(--gold-soft) 100%
  );
  border-radius: 8px;
  opacity: 0;
  transition: opacity 0.3s var(--ease);
  z-index: -1;
  pointer-events: none;
}
.news-row:hover::before {
  opacity: 1;
}
.news-row:hover {
  transform: translateX(2px);
}
.news-row.hide {
  display: none;
}

.news-row-date {
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.1;
  background: var(--paper-cream);
  border: 1px solid var(--gold);
  border-radius: 6px;
  padding: var(--sp-2) var(--sp-3);
  position: relative;
}
.news-row-date em {
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--seal-red);
  font-style: normal;
  line-height: 1;
}
.news-row-date i {
  font-size: var(--fs-xs);
  color: var(--ink-mute);
  margin-top: 4px;
  letter-spacing: 0.1em;
  font-style: normal;
  font-family: var(--font-zh-serif);
}

.news-row-cat {
  font-family: var(--font-zh-serif);
  font-size: var(--fs-xs);
  color: var(--brocade-emerald-deep);
  border: 1px solid var(--brocade-emerald);
  border-radius: 4px;
  padding: 4px 12px;
  letter-spacing: 0.2em;
  text-align: center;
  background: rgba(42, 138, 110, 0.06);
  font-weight: 600;
}
.news-row[data-cat="dynamic"] .news-row-cat {
  color: var(--seal-red-deep);
  border-color: var(--seal-red);
  background: rgba(177, 30, 30, 0.06);
}

.news-row-title {
  font-family: var(--font-zh-serif);
  font-size: var(--fs-lg);
  color: var(--ink);
  letter-spacing: 0.05em;
  font-weight: 500;
  transition: color 0.25s var(--ease);
}
.news-row:hover .news-row-title {
  color: var(--seal-red);
}

.news-row-arrow {
  font-family: var(--font-en);
  color: var(--ink-faint);
  font-size: var(--fs-xl);
  transition:
    transform 0.3s var(--ease),
    color 0.3s var(--ease);
}
.news-row:hover .news-row-arrow {
  color: var(--seal-red);
  transform: translateX(6px);
}

/* ========================================================================
   §7 下载三端互通
   ======================================================================== */
.cta {
  position: relative;
  padding: var(--sp-10) 0 var(--sp-9);
  background: var(--grad-ink);
  color: var(--paper-cream);
  overflow: hidden;
  isolation: isolate;
}
.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='100' height='100' viewBox='0 0 100 100'><g fill='none' stroke='%23E6A23C' stroke-width='0.5' opacity='0.10'><path d='M50 10 L90 50 L50 90 L10 50 Z'/><circle cx='50' cy='50' r='5' fill='none'/></g></svg>");
  background-size: 100px 100px;
}
.cta::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--grad-gold);
  z-index: 1;
}

.cta-glow-1,
.cta-glow-2 {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}
.cta-glow-1 {
  width: 500px;
  height: 500px;
  top: -200px;
  right: -150px;
  background: radial-gradient(
    circle,
    rgba(230, 162, 60, 0.2) 0%,
    transparent 70%
  );
}
.cta-glow-2 {
  width: 400px;
  height: 400px;
  bottom: -150px;
  left: -100px;
  background: radial-gradient(
    circle,
    rgba(177, 30, 30, 0.2) 0%,
    transparent 70%
  );
}

.cta-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-8);
  align-items: center;
}
.cta-text {
  max-width: 540px;
}
.cta-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-en);
  font-size: var(--fs-xs);
  color: var(--gold-light);
  letter-spacing: 0.5em;
  margin-bottom: var(--sp-4);
  font-weight: 500;
}
.cta-eyebrow::before {
  content: "";
  width: 32px;
  height: 1.5px;
  background: var(--grad-gold);
}
.cta-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, var(--fs-4xl));
  font-weight: 700;
  color: var(--paper-cream);
  letter-spacing: 0.1em;
  line-height: 1.3;
  margin-bottom: var(--sp-4);
}
.cta-title em {
  color: var(--gold-light);
  font-style: normal;
  font-family: var(--font-zh-serif);
}
.cta-desc {
  font-family: var(--font-zh-serif);
  font-size: var(--fs-base);
  color: rgba(248, 240, 220, 0.85);
  letter-spacing: 0.1em;
  line-height: 1.9;
}

.cta-platforms {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-3);
}
.cta-platform {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-5) var(--sp-3);
  background: rgba(248, 240, 220, 0.05);
  border: 1px solid rgba(230, 162, 60, 0.3);
  border-radius: 6px;
  text-decoration: none;
  color: inherit;
  transition:
    transform 0.3s var(--ease),
    background 0.3s var(--ease),
    border-color 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}
.cta-platform:hover {
  transform: translateY(-3px);
  background: rgba(248, 240, 220, 0.1);
  border-color: var(--gold);
  box-shadow: var(--shadow-gold);
}
.cta-platform-ico {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--grad-gold);
  border-radius: 12px;
  color: var(--ink-ink);
  margin-bottom: var(--sp-2);
}
.cta-platform-ico svg {
  width: 26px;
  height: 26px;
}
.cta-platform-name {
  font-family: var(--font-zh-serif);
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--paper-cream);
  letter-spacing: 0.1em;
}
.cta-platform-sub {
  font-family: var(--font-en);
  font-size: var(--fs-xs);
  color: var(--gold-light);
  letter-spacing: 0.2em;
}
.cta-platform-arrow {
  position: absolute;
  top: 8px;
  right: 8px;
  font-size: var(--fs-sm);
  color: var(--gold);
  opacity: 0;
  transform: translate(-4px, 4px);
  transition: all 0.3s var(--ease);
}
.cta-platform:hover .cta-platform-arrow {
  opacity: 1;
  transform: translate(0, 0);
}

.cta-qr {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
  margin-top: var(--sp-5);
  padding: var(--sp-5);
  background: rgba(248, 240, 220, 0.04);
  border: 1px dashed rgba(230, 162, 60, 0.35);
  border-radius: 8px;
}
.cta-qr-frame {
  width: 130px;
  height: 130px;
  padding: 10px;
  background: var(--paper-cream);
  border-radius: 6px;
  border: 2px solid var(--gold);
  box-shadow:
    0 0 0 4px rgba(230, 162, 60, 0.2),
    0 8px 24px rgba(0, 0, 0, 0.3);
}
.cta-qr-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.cta-qr-label {
  font-family: var(--font-display);
  font-size: var(--fs-base);
  color: var(--gold-light);
  letter-spacing: 0.3em;
  font-weight: 600;
}
.cta-qr-sub {
  font-family: var(--font-en);
  font-size: var(--fs-xs);
  color: rgba(248, 240, 220, 0.55);
  letter-spacing: 0.3em;
}

/* 微信小程序按钮点击后 QR 区域高亮脉冲（替代原生锚点滚动） */
@keyframes cta-qr-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(245, 213, 138, 0.55);
    border-color: var(--gold-light);
  }
  60% {
    box-shadow: 0 0 0 14px rgba(245, 213, 138, 0.12);
    border-color: var(--gold);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(245, 213, 138, 0);
    border-color: var(--gold);
  }
}
.cta-qr.is-highlight {
  animation: cta-qr-pulse 1.6s ease-out;
  border-style: solid;
}

/* ========================================================================
   页脚
   ======================================================================== */
.site-footer {
  position: relative;
  background: var(--ink-ink);
  color: var(--paper-cream);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--grad-gold);
}
.site-footer::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 0;
  right: 0;
  height: 60px;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'><g fill='none' stroke='%23C88A24' stroke-width='0.6' opacity='0.25'><path d='M30 5 L55 30 L30 55 L5 30 Z'/><circle cx='30' cy='30' r='3' fill='%23B11E1E' opacity='0.6'/></g></svg>");
  background-size: 60px 60px;
  pointer-events: none;
  opacity: 0.4;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: var(--sp-6);
  padding: calc(var(--sp-8) + 60px) var(--sp-5) var(--sp-8);
  position: relative;
  z-index: 1;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.footer-logo {
  max-width: 200px;
  height: 40px;
  width: auto;
  filter: brightness(0) invert(1);
  margin-bottom: var(--sp-2);
}
.footer-brand-name {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--paper-cream);
  letter-spacing: 0.15em;
}
.footer-desc {
  font-size: var(--fs-sm);
  color: rgba(248, 240, 220, 0.65);
  line-height: 1.9;
  letter-spacing: 0.05em;
}

.footer-title {
  font-family: var(--font-zh-serif);
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--paper-cream);
  margin-bottom: var(--sp-4);
  letter-spacing: 0.2em;
  position: relative;
  padding-bottom: var(--sp-2);
}
.footer-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: var(--grad-gold);
  border-radius: 1px;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.footer-col a,
.footer-col li {
  font-size: var(--fs-sm);
  color: rgba(248, 240, 220, 0.65);
  letter-spacing: 0.1em;
  transition:
    color 0.25s var(--ease),
    padding-left 0.25s var(--ease);
  display: inline-block;
}
.footer-col a::before {
  content: "·";
  color: var(--gold);
  display: none;
  margin-right: 4px;
  font-weight: 700;
}
.footer-col a:hover {
  color: var(--gold-light);
  padding-left: 4px;
}
.footer-col a:hover::before {
  display: inline;
}
.footer-contact {
  font-size: var(--fs-sm);
  color: rgba(248, 240, 220, 0.65);
  line-height: 1.9;
  letter-spacing: 0.05em;
}

.footer-monitor {
  grid-column: 1 / -1;
  margin-top: var(--sp-5);
  padding-top: var(--sp-5);
  border-top: 1px dashed rgba(248, 240, 220, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-4);
  font-size: var(--fs-sm);
  color: rgba(248, 240, 220, 0.6);
  letter-spacing: 0.15em;
  flex-wrap: wrap;
}
.footer-monitor .seal {
  width: 48px;
  height: 48px;
  font-size: 0.75rem;
}
.footer-monitor-text {
  display: flex;
  flex-direction: column;
  line-height: 1.4;
  text-align: left;
}
.footer-monitor-text strong {
  color: var(--paper-cream);
  font-weight: 600;
  font-family: var(--font-zh-serif);
}
.footer-monitor-text small {
  font-size: var(--fs-xs);
  color: rgba(248, 240, 220, 0.5);
}

.footer-bottom {
  border-top: 1px solid rgba(248, 240, 220, 0.1);
  background: rgba(0, 0, 0, 0.3);
}
.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: var(--sp-4) var(--sp-5);
  flex-wrap: wrap;
}
.footer-copyright {
  font-size: var(--fs-xs);
  color: rgba(248, 240, 220, 0.5);
  letter-spacing: 0.05em;
}
.footer-icp {
  margin-left: var(--sp-3);
  color: rgba(248, 240, 220, 0.5);
  transition: color 0.25s var(--ease);
}
.footer-icp:hover {
  color: var(--gold-light);
}

/* ========================================================================
   面包屑导航（SEO + UX）
   ======================================================================== */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-2);
  padding-top: calc(var(--header-h) + var(--sp-3));
  padding-bottom: 0;
  font-size: var(--fs-sm);
  color: var(--ink-mute);
  letter-spacing: 0.05em;
}
.breadcrumb a {
  color: var(--ink-mute);
  transition: color 0.2s var(--ease);
}
.breadcrumb a:hover {
  color: var(--seal-red);
}
.breadcrumb-sep {
  color: var(--line-strong);
  font-family: var(--font-en);
}
.breadcrumb-current {
  color: var(--seal-red);
  font-weight: 500;
  font-family: var(--font-zh-serif);
}

.footer-age {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}
.footer-age img {
  height: 40px;
  width: auto;
}
.footer-age > div {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.footer-age strong {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  color: var(--paper-cream);
  font-weight: 700;
}
.footer-age span {
  font-size: var(--fs-xs);
  color: rgba(248, 240, 220, 0.5);
  letter-spacing: 0.15em;
}

.footer-tip {
  padding: var(--sp-3) var(--sp-5) var(--sp-4);
  font-size: var(--fs-xs);
  color: rgba(248, 240, 220, 0.4);
  text-align: center;
  line-height: 1.8;
  letter-spacing: 0.05em;
}

/* ========================================================================
   微信遮罩
   ======================================================================== */
.wechat-mask {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(15, 42, 53, 0.92);
  align-items: center;
  justify-content: center;
  padding: var(--sp-5);
  animation: fadeIn 0.3s var(--ease);
}
.wechat-mask.active {
  display: flex;
}
.wechat-mask img {
  max-width: 100%;
  height: auto;
}
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ========================================================================
   返回顶部（含阅读进度环）
   ======================================================================== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 50;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--ivory);
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--ink-mute);
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition:
    opacity 0.3s var(--ease),
    transform 0.3s var(--ease),
    background 0.3s var(--ease),
    color 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.back-to-top:hover {
  background: var(--grad-gold);
  color: var(--ink-ink);
  border-color: var(--gold);
  box-shadow: var(--shadow-gold);
}
.back-to-top-progress {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 64px;
  height: 64px;
  transform: translate(-50%, -50%);
  pointer-events: none;
}
.back-to-top-progress circle {
  fill: none;
  stroke: var(--gold);
  stroke-width: 2.5;
  stroke-linecap: round;
  transform: rotate(-90deg);
  transform-origin: 30px 30px;
  stroke-dasharray: 170;
  stroke-dashoffset: 170;
  transition: stroke-dashoffset 0.1s linear;
}
.back-to-top svg.arrow {
  width: 18px;
  height: 18px;
  position: relative;
  z-index: 1;
}

/* ========================================================================
   客服浮窗（PC only，H5 隐藏；tab 始终可见，展开/收起卡片）
   ======================================================================== */
.kf-float {
  position: fixed;
  right: 20px;
  bottom: 25%;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 8px;
}

.kf-card {
  position: relative;
  width: 280px;
  padding: var(--sp-5);
  background: var(--ivory);
  border: 1px solid var(--gold);
  border-radius: 8px;
  box-shadow:
    0 16px 40px rgba(15, 42, 53, 0.2),
    0 0 0 4px rgba(230, 162, 60, 0.1);
  transition:
    transform 0.4s var(--ease),
    opacity 0.35s var(--ease);
}
.kf-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--grad-cinnabar);
  border-radius: 8px 8px 0 0;
}
.kf-float.collapsed .kf-card {
  transform: translateX(calc(100% + 20px));
  opacity: 0;
  pointer-events: none;
}

.kf-card-head {
  margin-bottom: var(--sp-4);
}
.kf-card-title {
  font-family: var(--font-zh-serif);
  font-size: var(--fs-base);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.05em;
  line-height: 1.5;
  margin-bottom: var(--sp-2);
}
.kf-card-desc {
  font-family: var(--font-zh-sans);
  font-size: var(--fs-xs);
  color: var(--ink-mute);
  line-height: 1.7;
  letter-spacing: 0.05em;
}

.kf-card-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-3) 0 var(--sp-2);
  border-top: 1px dashed var(--line);
}
.kf-qr-frame {
  width: 150px;
  height: 150px;
  padding: 8px;
  background: var(--paper-cream);
  border: 1px solid var(--gold);
  border-radius: 4px;
}
.kf-qr-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.kf-qr-tip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  margin: 0;
}
.kf-qr-tip-line {
  font-family: var(--font-zh-sans);
  font-size: var(--fs-xs);
  color: var(--ink-mute);
  letter-spacing: 0.1em;
}
.kf-qr-tip-em {
  font-weight: 600;
  color: var(--seal-red);
  font-size: var(--fs-sm);
  font-family: var(--font-zh-serif);
}

/* 展开/收起 tab —— 始终固定在屏幕右侧 */
.kf-tab {
  position: relative;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: 40px;
  padding: 12px 6px;
  border: 1px solid var(--gold);
  border-radius: 6px;
  background: var(--ivory);
  color: var(--seal-red);
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(15, 42, 53, 0.15);
  transition:
    background 0.25s var(--ease),
    color 0.25s var(--ease),
    border-color 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}
/* 箭头：tab 内部顶部居中，完全在 tab 边框内
   展开态朝右（"点我收起"），收起态朝左（"点我展开"） */
/* 箭头已移除 */
.kf-tab:hover {
  background: var(--grad-gold);
  color: var(--ink-ink);
  border-color: var(--gold);
  box-shadow: 0 6px 16px rgba(230, 162, 60, 0.3);
}
.kf-tab-text {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: var(--font-zh-serif);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 4px;
  line-height: 1;
}
/* 展开态轻微呼吸提示（PC 首次进入时可见） */
.kf-float:not(.collapsed) .kf-tab {
  animation: kf-tab-pulse 3s ease-in-out infinite 1.5s;
}
@keyframes kf-tab-pulse {
  0%, 100% { box-shadow: 0 4px 12px rgba(15, 42, 53, 0.15); }
  50%      { box-shadow: 0 6px 20px rgba(230, 162, 60, 0.35); }
}

@media (prefers-reduced-motion: reduce) {
  .kf-tab,
  .scroll-arrow,
  .hero-bg-img {
    animation: none !important;
  }
  .mode-card-tile {
    transform: none !important;
  }
}

/* ========================================================================
   响应式
   ======================================================================== */
@media (max-width: 1023px) {
  :root {
    --sp-9: 5rem;
    --sp-10: 6rem;
  }
  .nav-menu {
    gap: var(--sp-5);
  }
  .nav-link {
    font-size: var(--fs-xs);
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--sp-6);
  }
  .hero-main {
    align-items: center;
    text-align: center;
  }
  .hero-seal {
    margin: 0 auto;
  }
  .hero-side {
    justify-content: center;
  }
  .hero-slogan-cn {
    justify-content: center;
  }

  .modes-grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin-inline: auto;
  }
  .story-inner {
    grid-template-columns: 1fr;
  }
  .story-visual {
    min-height: 360px;
  }

  .features-timeline::before {
    left: 30px;
    transform: none;
  }
  .feature-item,
  .feature-item:nth-child(even) {
    grid-template-columns: 60px 1fr;
  }
  .feature-spacer {
    display: none;
  }
  .feature-item:nth-child(odd) .feature-spacer,
  .feature-item:nth-child(even) .feature-spacer {
    display: none;
  }
  .feature-item:nth-child(even) .feature-card,
  .feature-item:nth-child(odd) .feature-card {
    grid-column: 2;
    grid-row: 1;
  }
  .feature-dot {
    left: 30px;
    transform: translate(-50%, -50%);
  }
  .feature-card::before {
    right: auto !important;
    left: -1px !important;
  }

  .credentials-grid {
    grid-template-columns: 1fr 1fr;
  }

  .cta-inner {
    grid-template-columns: 1fr;
  }
  .cta-platforms {
    grid-template-columns: 1fr 1fr 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-6);
  }
}

@media (max-width: 767px) {
  :root {
    --header-h: 60px;
    --sp-9: 4rem;
    --sp-10: 5rem;
  }

  body.menu-open {
    overflow: hidden;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--sp-4) var(--sp-5);
    background: var(--ivory);
    border-bottom: 1px solid var(--line);
    transform: translateY(-120%);
    transition: transform 0.4s var(--ease);
    margin-left: 0;
  }
  .nav-menu.open {
    transform: translateY(0);
  }
  .nav-link {
    padding: 0.9rem 0;
    font-size: var(--fs-base);
    text-align: center;
    border-bottom: 1px solid var(--line-soft);
  }
  .nav-link:last-child {
    border-bottom: 0;
  }
  .nav-link::after {
    display: none;
  }

  .nav-cta {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .brand-text {
    display: none;
  }

  .hero-inner {
    padding-top: var(--sp-6);
    padding-bottom: var(--sp-8);
  }
  .hero-logo {
    max-width: 90vw;
  }
  .hero-slogan-cn {
    font-size: 1.5rem;
  }
  .hero-cta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-2);
    width: 100%;
  }
  .hero-cta > .btn {
    padding: 0.65rem 0.5rem;
    width: 100%;
    justify-content: center;
    gap: 0.4rem;
  }
  .hero-cta > .btn .btn-big {
    font-size: var(--fs-sm);
  }
  .hero-cta > .btn .btn-mini {
    font-size: 0.5625rem;
  }
  .hero-cta > .btn img,
  .hero-cta > .btn svg {
    width: 18px;
    height: 18px;
  }
  .hero-badges {
    gap: 0.4rem;
  }
  .hero-badge {
    padding: 0.3rem 0.7rem;
    font-size: var(--fs-xs);
  }
  .hero-qr-card {
    min-width: 200px;
    transform: none;
    padding: var(--sp-4);
  }
  .hero-qr-frame {
    width: 140px;
    height: 140px;
  }

  .scroll-indicator {
    display: none;
  }

  .modes-grid {
    grid-template-columns: 1fr;
  }

  .story-content {
    padding: var(--sp-5);
  }
  .story-stats {
    grid-template-columns: 1fr 1fr 1fr;
  }
  .story-stat-num {
    font-size: var(--fs-2xl);
  }

  .features-timeline {
    padding: var(--sp-5) 0;
  }
  .feature-item {
    gap: var(--sp-5);
    margin-bottom: var(--sp-6);
  }
  .feature-card {
    padding: var(--sp-4);
  }
  .feature-title {
    font-size: var(--fs-lg);
  }
  .feature-desc {
    font-size: var(--fs-sm);
  }

  .credentials-grid {
    grid-template-columns: 1fr;
  }
  .cred-card {
    padding: var(--sp-5);
  }

  .news-tabs {
    gap: 0;
  }
  .news-tab {
    padding: var(--sp-3);
    font-size: var(--fs-sm);
  }
  .news-tab::after {
    left: var(--sp-3);
    right: var(--sp-3);
  }
  .news-row {
    grid-template-columns: 70px 1fr auto;
    grid-template-rows: auto auto;
    gap: var(--sp-2) var(--sp-3);
    padding: var(--sp-4) 0;
  }
  .news-row-date {
    grid-column: 1;
    grid-row: 1 / 3;
    align-self: center;
  }
  .news-row-cat {
    grid-column: 2;
    grid-row: 1;
    justify-self: start;
  }
  .news-row-title {
    grid-column: 2 / 4;
    grid-row: 2;
    font-size: var(--fs-base);
  }
  .news-row-arrow {
    display: none;
  }

  .cta-platforms {
    grid-template-columns: 1fr;
  }
  .cta-qr-frame {
    width: 110px;
    height: 110px;
  }

  .footer-inner {
    display: none;
  }
  .site-footer::after {
    height: 0;
  }
  .footer-monitor {
    display: none;
  }
  .footer-bottom-inner {
    flex-direction: row;
    justify-content: center;
    align-items: center;
    text-align: center;
    gap: var(--sp-3);
    padding: var(--sp-3) var(--sp-4);
    flex-wrap: wrap;
  }
  .footer-tip {
    padding: var(--sp-2) var(--sp-4) var(--sp-3);
    line-height: 1.7;
  }
  .footer-icp {
    margin-left: 0;
    display: inline;
    margin-top: 0;
  }
  .footer-copyright {
    width: 100%;
    text-align: center;
  }

  .kf-float {
    display: none;
  }

  .back-to-top {
    bottom: 20px;
    right: 16px;
    width: 44px;
    height: 44px;
  }
  .back-to-top-progress {
    width: 54px;
    height: 54px;
  }
}

@media (max-width: 380px) {
  .hero-cta {
    grid-template-columns: 1fr;
  }
  .hero-cta > .btn {
    padding: 0.7rem 0.6rem;
  }
  .hero-badges {
    gap: 0.3rem;
  }
  .hero-badge {
    padding: 0.25rem 0.5rem;
    font-size: 0.7rem;
  }
  .story-stats {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal],
  [data-reveal-scale],
  [data-reveal-flip] {
    opacity: 1;
    transform: none;
  }
}

/* ========================================================================
   详情页 article 专属样式（news/*.html 共享）
   ======================================================================== */
.article-page {
  background: var(--ivory);
}
.article-back {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-5);
  font-size: var(--fs-sm);
  color: var(--ink-mute);
  letter-spacing: 0.1em;
  transition: color 0.25s var(--ease);
}
.article-back:hover {
  color: var(--seal-red);
}
.article-hero {
  padding: calc(var(--header-h) + var(--sp-7)) 0 var(--sp-7);
  text-align: center;
  background: linear-gradient(
    180deg,
    var(--paper-cream-soft) 0%,
    var(--ivory) 100%
  );
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='100' height='100' viewBox='0 0 100 100'><g fill='none' stroke='%23C88A24' stroke-width='0.5' opacity='0.10'><path d='M50 10 L90 50 L50 90 L10 50 Z'/></g></svg>");
  background-size: 100px 100px;
  pointer-events: none;
}
.article-hero-cat {
  display: inline-block;
  padding: 4px 14px;
  font-family: var(--font-zh-serif);
  font-size: var(--fs-xs);
  color: var(--seal-red);
  border: 1px solid var(--seal-red);
  border-radius: 4px;
  letter-spacing: 0.2em;
  margin-bottom: var(--sp-4);
  background: rgba(177, 30, 30, 0.04);
  font-weight: 600;
  position: relative;
  z-index: 1;
}
.article-hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.875rem, 4vw, var(--fs-4xl));
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.1em;
  line-height: 1.4;
  max-width: 760px;
  margin: 0 auto var(--sp-4);
  position: relative;
  z-index: 1;
}
.article-hero-meta {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-en);
  font-size: var(--fs-sm);
  color: var(--ink-mute);
  letter-spacing: 0.15em;
  position: relative;
  z-index: 1;
}
.article-hero-meta-sep {
  width: 16px;
  height: 1px;
  background: var(--line-strong);
}

.article-body {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--sp-9) var(--sp-5);
  font-family: var(--font-zh-serif);
  font-size: var(--fs-lg);
  line-height: 2;
  color: var(--ink-soft);
}
.article-body p {
  margin-bottom: var(--sp-5);
  letter-spacing: 0.05em;
}
.article-body h2 {
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  color: var(--ink);
  letter-spacing: 0.1em;
  margin: var(--sp-7) 0 var(--sp-4);
  padding-left: var(--sp-3);
  border-left: 3px solid var(--seal-red);
}
.article-body h3 {
  font-size: var(--fs-xl);
  color: var(--ink);
  margin: var(--sp-5) 0 var(--sp-3);
  letter-spacing: 0.05em;
}
.article-body ul,
.article-body ol {
  margin: 0 0 var(--sp-5);
  padding-left: var(--sp-5);
}
.article-body li {
  margin-bottom: var(--sp-2);
  list-style: disc;
}
.article-body blockquote {
  margin: var(--sp-6) 0;
  padding: var(--sp-4) var(--sp-5);
  background: var(--gold-soft);
  border-left: 3px solid var(--gold);
  font-family: var(--font-zh-serif);
  font-style: normal;
  color: var(--ink);
}
.article-body code {
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 0.9em;
  background: var(--paper);
  padding: 2px 6px;
  border-radius: 3px;
}

.article-related {
  background: var(--paper);
  border-top: 1px solid var(--line);
  padding: var(--sp-9) 0;
}
.article-related-head {
  text-align: center;
  margin-bottom: var(--sp-7);
}
.article-related-head h3 {
  font-family: var(--font-zh-serif);
  font-size: var(--fs-xl);
  color: var(--ink);
  letter-spacing: 0.2em;
  font-weight: 700;
}
.article-related-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-5);
}
.article-related-item {
  background: var(--ivory);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: var(--sp-5);
  transition:
    border-color 0.25s var(--ease),
    transform 0.25s var(--ease);
}
.article-related-item:hover {
  border-color: var(--gold);
  transform: translateY(-3px);
}
.article-related-item-cat {
  display: inline-block;
  font-family: var(--font-zh-serif);
  font-size: var(--fs-xs);
  color: var(--seal-red);
  border: 1px solid var(--seal-red);
  border-radius: 4px;
  padding: 2px 8px;
  letter-spacing: 0.15em;
  margin-bottom: var(--sp-3);
  background: rgba(177, 30, 30, 0.04);
  font-weight: 600;
}
.article-related-item-title {
  font-family: var(--font-zh-serif);
  font-size: var(--fs-base);
  color: var(--ink);
  letter-spacing: 0.05em;
  line-height: 1.6;
  margin-bottom: var(--sp-3);
}
.article-related-item-date {
  font-family: var(--font-en);
  font-size: var(--fs-xs);
  color: var(--ink-mute);
  letter-spacing: 0.15em;
}

@media (max-width: 1023px) {
  .article-related-list {
    grid-template-columns: 1fr 1fr;
  }
  .article-related-list > a:nth-child(3) {
    grid-column: 1 / -1;
  }
}
@media (max-width: 767px) {
  .article-related-list {
    grid-template-columns: 1fr;
  }
  .article-related-list > a:nth-child(3) {
    grid-column: auto;
  }
  .article-hero {
    padding: var(--sp-7) 0 var(--sp-5);
  }
  .article-body {
    padding: var(--sp-7) var(--sp-5);
    font-size: var(--fs-base);
  }
}

/* ========================================================================
   列表页 news.html 专属样式
   ======================================================================== */
.news-page {
  background: var(--ivory);
}
.news-page-hero {
  padding: calc(var(--header-h) + var(--sp-7)) 0 var(--sp-7);
  text-align: center;
  background: linear-gradient(
    180deg,
    var(--paper-cream-soft) 0%,
    var(--ivory) 100%
  );
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.news-page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='100' height='100' viewBox='0 0 100 100'><g fill='none' stroke='%23C88A24' stroke-width='0.5' opacity='0.10'><path d='M50 10 L90 50 L50 90 L10 50 Z'/></g></svg>");
  background-size: 100px 100px;
  pointer-events: none;
}
.news-page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, var(--fs-4xl));
  color: var(--ink);
  letter-spacing: 0.15em;
  margin-bottom: var(--sp-3);
  font-weight: 700;
  position: relative;
  z-index: 1;
}
.news-page-hero p {
  font-size: var(--fs-base);
  color: var(--ink-mute);
  letter-spacing: 0.1em;
  position: relative;
  z-index: 1;
}
.news-page-breadcrumb {
  font-family: var(--font-en);
  font-size: var(--fs-xs);
  color: var(--ink-faint);
  letter-spacing: 0.25em;
  margin-bottom: var(--sp-4);
  position: relative;
  z-index: 1;
}
.news-page-breadcrumb a {
  color: var(--ink-mute);
  transition: color 0.25s var(--ease);
}
.news-page-breadcrumb a:hover {
  color: var(--seal-red);
}

.news-page-list {
  max-width: 960px;
  margin: 0 auto;
  padding: var(--sp-9) var(--sp-5);
}
.news-page-list .news-tabs {
  margin-bottom: var(--sp-6);
  justify-content: flex-start;
}
.news-page-list .news-row {
  grid-template-columns: 100px 72px 1fr auto;
}

@media (max-width: 767px) {
  .news-page-list .news-row {
    grid-template-columns: 70px 1fr auto;
    grid-template-rows: auto auto;
  }
  .news-page-list .news-row-cat {
    grid-row: 1;
  }
  .news-page-list .news-row-title {
    grid-row: 2;
  }
}