@font-face {
  font-family: 'MaShanZheng';
  src: url('https://chulian-peiwan.oss-cn-beijing.aliyuncs.com/site/fonts/ma-shan-zheng.woff2') format('woff2');
  font-display: swap;
}

:root {
  --ink: #3a2a16;
  --ink-2: #6d5739;
  --ink-3: #93805f;
  --red: #a8341f;
  --red-2: #c2432b;
  --red-deep: #7d2113;
  --gold: #c9a253;
  --line: rgba(150, 108, 56, 0.22);
  --cream: #fbf3e2;
  --cream-2: #f6ead2;
  --paper: #fffdf6;
  --brush: 'MaShanZheng', 'STXingkai', 'Kaiti SC', 'KaiTi', serif;
  --kai: 'STKaiti', 'KaiTi', 'Kaiti SC', 'Songti SC', serif;
  --hei: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--hei);
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(255, 250, 240, 0.92), rgba(250, 240, 222, 0.94)),
    url('https://chulian-peiwan.oss-cn-beijing.aliyuncs.com/site/paper.jpg') center / 320px repeat;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 6px;
  font-family: var(--kai);
  font-size: 16px;
  letter-spacing: 3px;
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease, filter 0.16s ease;
  will-change: transform;
}
.btn-main {
  color: #fff6e6;
  background:
    radial-gradient(120% 80% at 50% -20%, rgba(255, 228, 194, 0.25), rgba(255, 228, 194, 0) 62%),
    linear-gradient(180deg, #cd4530 0%, #b02f1b 52%, #8c1f0f 100%);
  box-shadow:
    inset 0 0 0 1px rgba(255, 218, 168, 0.55),
    inset 0 1px 0 rgba(255, 255, 255, 0.22),
    0 10px 22px rgba(140, 42, 20, 0.28);
}
.btn-main:hover { transform: translateY(-2px); filter: brightness(1.06); }
.btn-paper {
  color: #6b4a1c;
  background: linear-gradient(180deg, #fffdf7, #f4e7cd);
  border: 1px solid rgba(196, 158, 110, 0.6);
  box-shadow: 0 4px 12px rgba(120, 85, 40, 0.12);
}
.btn-paper:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(120, 85, 40, 0.18); }
.btn-ghost {
  color: #f7e6c8;
  border: 1px solid rgba(255, 228, 190, 0.5);
}
.btn-ghost:hover { background: rgba(255, 236, 200, 0.12); transform: translateY(-2px); }
.btn-sm { padding: 9px 20px; font-size: 14px; letter-spacing: 2px; }
/* 浅色顶栏用的描边按钮（btn-ghost 是给深色区准备的，在这里看不清） */
.btn-outline {
  color: #8c5526;
  background: rgba(255, 253, 247, 0.7);
  border: 1px solid rgba(176, 52, 31, 0.34);
  box-shadow: 0 2px 6px rgba(120, 80, 35, 0.08);
}
.btn-outline:hover { background: #fffdf7; border-color: rgba(176, 52, 31, 0.6); transform: translateY(-1px); }
.topbar-cta { display: flex; align-items: center; gap: 10px; }
.btn-lg { padding: 16px 38px; font-size: 18px; }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 28px;
  height: 68px;
  padding: 0 clamp(20px, 5vw, 64px);
  background: rgba(255, 251, 242, 0.86);
  backdrop-filter: saturate(1.2) blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { width: 34px; height: 34px; border-radius: 9px; box-shadow: 0 2px 8px rgba(120, 60, 30, 0.2); }
.brand-name { font-family: var(--brush); font-size: 24px; letter-spacing: 3px; color: #3a2614; }
.nav { display: flex; gap: 26px; margin-left: auto; }
.nav a {
  font-family: var(--kai);
  font-size: 15px;
  letter-spacing: 2px;
  color: var(--ink-2);
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.nav a:hover { color: var(--red); border-bottom-color: rgba(168, 52, 31, 0.5); }

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  min-height: min(88vh, 800px);
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('https://chulian-peiwan.oss-cn-beijing.aliyuncs.com/site/hero.jpg') center 42% / cover no-repeat;
  transform: scale(1.04);
  z-index: -2;
}
.hero-veil {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(255, 251, 242, 0.94) 0%, rgba(255, 250, 238, 0.8) 38%, rgba(255, 246, 232, 0.12) 68%, rgba(255, 246, 232, 0) 100%),
    linear-gradient(180deg, rgba(255, 252, 245, 0.5) 0%, rgba(255, 248, 235, 0) 30%, rgba(251, 243, 226, 0.95) 100%);
}
.hero-inner {
  width: min(1200px, 92vw);
  margin: 0 auto;
  padding: 60px 0 96px;
}
.kicker {
  margin: 0 0 14px;
  font-family: var(--kai);
  font-size: 13px;
  letter-spacing: 6px;
  color: var(--red);
  opacity: 0.85;
}
.hero-title {
  position: relative;
  display: inline-flex;
  flex-wrap: nowrap;
  align-items: baseline;
  margin: 0;
  font-family: var(--brush);
  font-size: clamp(44px, 9vw, 128px);
  line-height: 1.05;
  letter-spacing: 10px;
  color: #41260e;
  text-shadow: 0 3px 0 rgba(255, 255, 255, 0.5);
}
.hero-title span { display: inline-block; white-space: nowrap; }
.hero-title .seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  /* em 会按自身 font-size 算，这里直接用视口单位，保证跟着标题一起缩放 */
  width: clamp(30px, 3.6vw, 50px);
  height: clamp(30px, 3.6vw, 50px);
  margin-left: 0.1em;
  font-family: var(--brush);
  font-style: normal;
  font-size: clamp(15px, 1.9vw, 26px);
  letter-spacing: 0;
  color: #fff2e0;
  background: linear-gradient(160deg, #c2432b, #992a18);
  border-radius: 0.04em;
  box-shadow:
    inset 0 0 0 0.03em rgba(255, 234, 205, 0.5),
    0 6px 16px rgba(120, 30, 15, 0.35);
  transform: rotate(-5deg) translateY(-0.35em);
}
.hero-slogan {
  margin: 26px 0 0;
  font-family: var(--kai);
  font-size: clamp(20px, 2.2vw, 27px);
  letter-spacing: 4px;
  color: #5a3c1b;
}
.hero-sub {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 2;
  color: #6d5739;
}
.hero-cta { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 34px; }
/* 第三个入口降级成文字，别让首屏堆三个大按钮 */
.hero-link {
  font-family: var(--kai);
  font-size: 14px;
  letter-spacing: 2px;
  /* 首屏这张图很亮，浅色字会看不见，跟 hero-note 统一用暖褐 */
  color: #6b4a1c;
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(107, 74, 28, 0.36);
  transition: color 0.16s ease, border-color 0.16s ease;
}
.hero-link:hover { color: #4d3517; border-bottom-color: rgba(77, 53, 23, 0.6); }
.hero-note {
  margin: 18px 0 0;
  font-size: 12.5px;
  letter-spacing: 1px;
  color: #93805f;
}
.hero-horse {
  position: absolute;
  right: max(-40px, calc((100vw - 1400px) / 2 - 60px));
  bottom: -18px;
  width: min(560px, 42vw);
  opacity: 0.96;
  filter: drop-shadow(0 24px 40px rgba(90, 55, 25, 0.22));
  z-index: -1;
  pointer-events: none;
}

/* ---------- 一句话条 ---------- */
.strip {
  background: linear-gradient(180deg, #8c2417, #6f1a0f);
  color: #f7e3c6;
  text-align: center;
  padding: 26px 20px;
}
.strip p {
  margin: 0;
  font-family: var(--kai);
  font-size: clamp(17px, 1.9vw, 22px);
  letter-spacing: 2px;
}
.strip .hl { color: #ffd9a8; border-bottom: 2px solid rgba(255, 217, 168, 0.4); padding-bottom: 2px; }

/* ---------- 段落通用 ---------- */
.section {
  width: min(1140px, 90vw);
  margin: 0 auto;
  padding: clamp(60px, 9vh, 110px) 0;
}
.section-head { max-width: 720px; margin-bottom: 42px; }
.eyebrow {
  margin: 0 0 10px;
  font-family: var(--kai);
  font-size: 13px;
  letter-spacing: 6px;
  color: var(--red);
}
.section h2 {
  margin: 0;
  font-family: var(--brush);
  font-size: clamp(36px, 4.4vw, 58px);
  line-height: 1.2;
  letter-spacing: 4px;
  color: #3f2610;
}
.lead {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.95;
  color: var(--ink-2);
}

/* ---------- 三步 ---------- */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }
.step {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-start;
  gap: 26px;
  padding: 26px 30px;
  border-radius: 14px;
  background:
    linear-gradient(180deg, rgba(255, 253, 246, 0.95), rgba(250, 240, 223, 0.92)),
    url('https://chulian-peiwan.oss-cn-beijing.aliyuncs.com/site/paper.jpg') center / 260px repeat;
  border: 1px solid rgba(196, 158, 110, 0.4);
  box-shadow:
    0 14px 34px rgba(95, 62, 28, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}
/* 右侧一枚很大的淡字，把长条的空白填掉 */
.step::after {
  position: absolute;
  right: 26px;
  bottom: -28px;
  font-family: var(--brush);
  font-size: 112px;
  line-height: 1;
  color: rgba(168, 52, 31, 0.055);
  pointer-events: none;
}
.step:nth-child(1)::after { content: '壹'; }
.step:nth-child(2)::after { content: '贰'; }
.step:nth-child(3)::after { content: '叁'; }
.step-no {
  flex: 0 0 auto;
  font-family: var(--brush);
  font-size: 40px;
  line-height: 1;
  color: #c2432b;
  opacity: 0.85;
  padding-top: 4px;
}
.step-body h3 {
  margin: 0 0 8px;
  font-family: var(--kai);
  font-size: 22px;
  letter-spacing: 2px;
  color: #3a2614;
}
.step-body p { margin: 0; font-size: 15px; line-height: 1.95; color: var(--ink-2); }

/* ---------- 说点实话 ---------- */
.section-dark {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: clamp(60px, 9vh, 100px) 0;
  background:
    linear-gradient(180deg, rgba(58, 32, 16, 0.9), rgba(40, 20, 10, 0.93)),
    url('https://chulian-peiwan.oss-cn-beijing.aliyuncs.com/site/city.jpg') center / cover no-repeat;
  color: #f3e2c6;
}
.section-dark > .section-head,
.section-dark > .truths {
  width: min(1140px, 90vw);
  margin-left: auto;
  margin-right: auto;
}
/* 深色区的标题跟下面的卡片左对齐（宽度拉到和卡片一样，别被 720px 收窄后居中） */
.section-dark > .section-head {
  max-width: min(1140px, 90vw);
}
.section-dark h2 { color: #fdf1dc; }
.section-dark .eyebrow { color: #e3a877; }
.truths {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.truths li {
  padding: 22px 24px;
  border-radius: 12px;
  background: rgba(255, 246, 232, 0.05);
  border: 1px solid rgba(255, 226, 186, 0.18);
}
.truths b {
  display: block;
  margin-bottom: 8px;
  font-family: var(--kai);
  font-size: 19px;
  letter-spacing: 2px;
  color: #ffd8a6;
}
.truths span { font-size: 14.5px; line-height: 1.85; color: rgba(246, 234, 213, 0.86); }

/* ---------- 路上的人 ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}
.card {
  position: relative;
  padding: 26px 22px 26px;
  border-radius: 14px;
  background:
    linear-gradient(180deg, rgba(255, 253, 246, 0.96), rgba(250, 240, 223, 0.94)),
    url('https://chulian-peiwan.oss-cn-beijing.aliyuncs.com/site/paper.jpg') center / 220px repeat;
  border: 1px solid rgba(196, 158, 110, 0.42);
  box-shadow:
    0 12px 28px rgba(95, 62, 28, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 20px 40px rgba(95, 62, 28, 0.16); }
.card-mark {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-family: var(--brush);
  font-size: 24px;
  color: #fff2e0;
  background: linear-gradient(160deg, #c2432b, #992a18);
  border-radius: 5px;
  box-shadow: inset 0 0 0 2px rgba(255, 234, 205, 0.35);
  transform: rotate(-4deg);
}
.card h3 {
  margin: 0 0 8px;
  font-family: var(--kai);
  font-size: 19px;
  letter-spacing: 1.5px;
  color: #3a2614;
}
.card p { margin: 0; font-size: 14px; line-height: 1.9; color: var(--ink-2); }

/* ---------- 规矩 ---------- */
.rules { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.rules li {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 22px 26px;
  border-left: 3px solid rgba(194, 67, 43, 0.5);
  background: linear-gradient(90deg, rgba(255, 252, 244, 0.9), rgba(255, 250, 240, 0.35));
  border-radius: 0 12px 12px 0;
}
.rules i {
  flex: 0 0 auto;
  font-family: var(--brush);
  font-style: normal;
  font-size: 26px;
  line-height: 1.4;
  color: #b0341f;
}
.rules b {
  display: block;
  margin-bottom: 6px;
  font-family: var(--kai);
  font-size: 18px;
  letter-spacing: 1.5px;
  color: #3a2614;
}
.rules p { margin: 0; font-size: 14.5px; line-height: 1.85; color: var(--ink-2); }

/* ---------- FAQ ---------- */
.section-faq { padding-bottom: clamp(40px, 6vh, 70px); }
.qa {
  border-bottom: 1px dashed rgba(150, 108, 56, 0.35);
  padding: 6px 0;
}
.qa summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 4px;
  font-family: var(--kai);
  font-size: 18px;
  letter-spacing: 1.5px;
  color: #3a2614;
  cursor: pointer;
  list-style: none;
}
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after {
  content: '+';
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--hei);
  font-size: 18px;
  color: #a8341f;
  border: 1px solid rgba(168, 52, 31, 0.35);
  border-radius: 50%;
  transition: transform 0.2s ease, background 0.2s ease;
}
.qa[open] summary::after { content: '−'; transform: rotate(180deg); background: rgba(168, 52, 31, 0.08); }
.qa p {
  margin: 0 0 20px;
  padding: 0 4px;
  font-size: 15px;
  line-height: 2;
  color: var(--ink-2);
}

/* ---------- 下载 ---------- */
.download {
  position: relative;
  overflow: hidden;
  margin-top: 20px;
  padding: clamp(70px, 11vh, 120px) 0;
  background:
    linear-gradient(180deg, rgba(74, 24, 12, 0.9), rgba(48, 16, 8, 0.93)),
    url('https://chulian-peiwan.oss-cn-beijing.aliyuncs.com/site/city.jpg') center 60% / cover no-repeat;
  color: #f7e6c8;
  text-align: center;
}
.download-inner { position: relative; z-index: 2; width: min(680px, 86vw); margin: 0 auto; }
.download h2 {
  margin: 0;
  font-family: var(--brush);
  font-size: clamp(42px, 5.4vw, 72px);
  letter-spacing: 8px;
  color: #ffeccf;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
}
.download p { margin: 16px 0 0; font-size: 15px; letter-spacing: 2px; color: rgba(247, 230, 200, 0.78); }
.download-cta { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; margin-top: 34px; }
.download-note { font-size: 12.5px; color: rgba(247, 230, 200, 0.55); margin-top: 22px; }
/* 便携版小字链接：比正文弱，但得看得出来能点 */
.download-alt { margin: 10px 0 0; font-size: 12.5px; color: rgba(247, 230, 200, 0.5); }
.download-alt a {
  color: rgba(255, 228, 188, 0.94);
  text-decoration: none;
  padding-bottom: 1px;
  border-bottom: 1px dashed rgba(255, 214, 160, 0.55);
}
.download-alt a:hover { color: #fff5e2; border-bottom-color: rgba(255, 236, 200, 0.95); }
/* 按钮里有「Windows」这种西文，3px 字距会把它拉散，下载区单独收紧 */
.download-cta .btn { letter-spacing: 1px; }
.download-mail {
  position: absolute;
  right: max(-40px, calc((100vw - 1320px) / 2 - 40px));
  bottom: -24px;
  width: min(380px, 30vw);
  opacity: 0.42;
  z-index: 1;
  pointer-events: none;
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.35));
}

/* ---------- 官方讨论群 ---------- */
.group { padding-top: 0; padding-bottom: clamp(50px, 8vh, 90px); }
.group-box {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 264px;
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
  padding: clamp(28px, 4vw, 48px);
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(255, 253, 246, 0.96), rgba(250, 240, 223, 0.94)),
    url('https://chulian-peiwan.oss-cn-beijing.aliyuncs.com/site/paper.jpg') center / 300px repeat;
  border: 1px solid rgba(196, 158, 110, 0.45);
  box-shadow:
    0 18px 40px rgba(95, 62, 28, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}
.group h2 {
  margin: 0;
  font-family: var(--brush);
  font-size: clamp(32px, 3.6vw, 46px);
  letter-spacing: 4px;
  color: #3f2610;
}
.group-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.group-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-2);
}
.group-list li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #c2432b;
  opacity: 0.55;
}
.group-qr {
  position: relative;
  margin: 0;
  padding: 14px 14px 10px;
  background: #fff;
  border: 1px solid rgba(196, 158, 110, 0.55);
  border-radius: 12px;
  box-shadow:
    0 12px 26px rgba(95, 62, 28, 0.16),
    inset 0 0 0 4px rgba(255, 250, 238, 0.9);
  transform: rotate(1.2deg);
  transition: transform 0.2s ease;
}
.group-qr:hover { transform: rotate(0deg) scale(1.015); }
.group-qr img { width: 100%; border-radius: 6px; }
.group-qr figcaption {
  padding-top: 9px;
  text-align: center;
  font-family: var(--kai);
  font-size: 13.5px;
  letter-spacing: 3px;
  color: #6b4a1c;
}
.group-seal {
  position: absolute;
  top: -14px;
  right: -12px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--brush);
  font-size: 15px;
  line-height: 1.1;
  color: #fff2e0;
  background: linear-gradient(160deg, #c2432b, #992a18);
  border-radius: 6px;
  box-shadow:
    inset 0 0 0 2px rgba(255, 234, 205, 0.4),
    0 6px 14px rgba(120, 30, 15, 0.32);
  transform: rotate(8deg);
  text-align: center;
}
.group-note {
  margin: 16px 0 0;
  font-size: 12.5px;
  letter-spacing: 0.5px;
  color: var(--ink-3);
  text-align: center;
}

/* 二维码放大层 */
.qr-mask {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(30, 18, 8, 0.84);
  backdrop-filter: blur(2px);
  cursor: zoom-out;
  animation: qr-in 0.18s ease;
}
.qr-mask img {
  width: min(360px, 82vw);
  padding: 14px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
}
@keyframes qr-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ---------- 页脚 ---------- */
.footer {
  padding: 40px clamp(20px, 5vw, 64px) 30px;
  border-top: 1px solid var(--line);
  background: rgba(255, 251, 242, 0.7);
}
.footer-top {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
  width: min(1140px, 90vw);
  margin: 0 auto;
}
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand img { width: 40px; height: 40px; border-radius: 10px; }
.footer-brand b { display: block; font-family: var(--brush); font-size: 21px; letter-spacing: 2px; }
.footer-brand span { font-size: 12.5px; color: var(--ink-3); letter-spacing: 1px; }
.footer-nav { display: flex; gap: 22px; }
.footer-nav a { font-family: var(--kai); font-size: 14.5px; color: var(--ink-2); letter-spacing: 1px; }
.footer-nav a:hover { color: var(--red); }
.footer-fine {
  width: min(1140px, 90vw);
  margin: 24px auto 0;
  padding-top: 18px;
  border-top: 1px dashed rgba(150, 108, 56, 0.3);
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.5px;
}

/* ---------- 进场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 自适应 ---------- */
@media (max-width: 1000px) {
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-horse { opacity: 0.28; right: -10%; width: 70vw; }
}
@media (max-width: 760px) {
  .nav { display: none; }
  .topbar { height: 60px; gap: 12px; }
  /* 手机顶栏只留一个按钮，体验入口在首屏还有 */
  .topbar-cta .btn-outline { display: none; }
  .brand-name { font-size: 20px; }
  .hero { min-height: 84vh; }
  .hero-inner { padding: 40px 0 70px; }
  .hero-title { font-size: clamp(40px, 12vw, 58px); letter-spacing: 4px; }
  .hero-title .seal { width: 26px; height: 26px; font-size: 13px; }
  .hero-horse { display: none; }
  .truths, .cards { grid-template-columns: 1fr; }
  .step { gap: 16px; padding: 20px; }
  .step-no { font-size: 30px; }
  .download-mail { display: none; }
  .group-box { grid-template-columns: 1fr; gap: 26px; }
  .group-qr { max-width: 230px; margin: 0 auto; transform: none; }
  .group-note { text-align: left; }
  .footer-top { justify-content: flex-start; }
}