/* ==========================================================================
   Textura — “Runway Commerce” 电商时装大片风格
   配色：深炭黑底 + 朱砂红强调 + 暖白文字 + 微光氛围
   字体：Bricolage Grotesque（西文显示）+ Noto Sans SC（中文）
   ========================================================================== */

:root {
  /* 色板 */
  --bg: #0b0b0e;
  --bg-soft: #111116;
  --surface: #16161c;
  --surface-2: #1e1e26;
  --surface-3: #26262f;
  --ink: #f5f3ee;
  --ink-soft: #b6b3aa;
  --ink-faint: #74726c;
  --line: #2a2a33;
  --line-strong: #3a3a46;
  --brand: #ff4d2e;
  --brand-deep: #d8341b;
  --brand-soft: #ff7a5e;
  --brand-glow: rgba(255, 77, 46, 0.45);
  --mint: #5fe0a8;
  --gold: #f2c14e;

  /* 字体 */
  --font-display: 'Bricolage Grotesque', 'Noto Sans SC', system-ui, sans-serif;
  --font-body: 'Noto Sans SC', system-ui, -apple-system, sans-serif;

  /* 度量 */
  --maxw: 1200px;
  --radius: 18px;
  --radius-sm: 12px;
  --gutter: clamp(20px, 5vw, 64px);
}

/* ---------- reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: 16px;
  /* 深色氛围：顶部朱砂光晕 + 底部冷调 */
  background-image:
    radial-gradient(1100px 560px at 82% -8%, rgba(255, 77, 46, 0.16), transparent 60%),
    radial-gradient(820px 480px at -8% 12%, rgba(255, 77, 46, 0.07), transparent 55%),
    linear-gradient(180deg, #0c0c10 0%, #0a0a0d 100%);
  min-height: 100vh;
  position: relative;
}

/* 颗粒纹理覆盖层 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.6;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
}

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

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

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

::selection {
  background: var(--brand);
  color: #fff;
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px) saturate(1.2);
  background: rgba(11, 11, 14, 0.72);
  border-bottom: 1px solid rgba(58, 58, 70, 0.5);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.brand__mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  overflow: hidden;
  display: block;
  flex-shrink: 0;
  box-shadow: 0 8px 22px -8px var(--brand-glow);
  background: var(--surface-2);
}

.brand__logo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.brand small {
  display: block;
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-top: -1px;
  font-weight: 500;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.nav__links a {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-soft);
  padding: 8px 14px;
  border-radius: 999px;
  transition: color 0.2s, background 0.2s;
}

.nav__links a:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.06);
}

.nav__cta {
  background: var(--brand) !important;
  color: #fff !important;
  font-weight: 700;
  box-shadow: 0 8px 20px -8px var(--brand-glow);
}

.nav__cta:hover {
  background: var(--brand-deep) !important;
}

.nav__toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  width: 42px;
  height: 42px;
  cursor: pointer;
  color: var(--ink);
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  padding: clamp(64px, 9vw, 120px) 0 clamp(40px, 5vw, 64px);
  overflow: hidden;
  z-index: 2;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--brand-soft);
  font-weight: 700;
  padding: 7px 14px;
  border: 1px solid rgba(255, 77, 46, 0.4);
  border-radius: 999px;
  background: rgba(255, 77, 46, 0.08);
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 6vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  margin: 22px 0 0;
}

.hero__title em {
  font-style: italic;
  font-weight: 700;
  color: var(--brand);
}

.hero__lede {
  margin-top: 22px;
  max-width: 50ch;
  font-size: clamp(15.5px, 1.5vw, 18px);
  color: var(--ink-soft);
  line-height: 1.7;
}

.hero__cta {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 700;
  padding: 14px 26px;
  border-radius: 999px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s, border-color 0.2s;
  font-family: var(--font-body);
}

.btn--primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-deep));
  color: #fff;
  box-shadow: 0 16px 34px -14px var(--brand-glow);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 22px 40px -16px var(--brand-glow);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--ink-soft);
}

/* hero 视觉：换衣前后对比墙 */
.hero__stage {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.tile {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 3 / 4;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.8);
  background: var(--surface);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.tile img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tile:hover {
  transform: translateY(-6px);
}

.tile__tag {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 1;
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #fff;
  background: rgba(0, 0, 0, 0.42);
  backdrop-filter: blur(4px);
  padding: 5px 10px;
  border-radius: 6px;
}

.tile__tag small {
  display: block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 10.5px;
  text-transform: none;
  letter-spacing: 0;
  opacity: 0.85;
  margin-top: 1px;
}

.tile--down { margin-top: 28px; }

.tile--result {
  grid-column: span 1;
  position: relative;
}
.tile--result::before {
  content: 'AI';
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 11px;
  letter-spacing: 0.12em;
  background: var(--brand);
  color: #fff;
  padding: 3px 8px;
  border-radius: 6px;
}

/* ---------- trust bar ---------- */
.trust {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 26px 0;
  position: relative;
  z-index: 2;
  background: rgba(255, 255, 255, 0.015);
}

.trust__row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 36px;
  align-items: center;
  justify-content: space-between;
}

.trust__item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink-soft);
  letter-spacing: 0.01em;
}

.trust__item svg {
  color: var(--brand);
  flex-shrink: 0;
}

/* ---------- section 通用 ---------- */
.section {
  padding: clamp(64px, 8vw, 112px) 0;
  position: relative;
  z-index: 2;
}

.section--alt {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.035));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 52px;
  flex-wrap: wrap;
}

.section__kicker {
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--brand-soft);
  font-weight: 700;
}

.section__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 4.2vw, 48px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-top: 12px;
  max-width: 18ch;
}

.section__title em {
  font-style: italic;
  color: var(--brand);
}

.section__intro {
  max-width: 44ch;
  color: var(--ink-soft);
  font-size: 15.5px;
}

/* feature grid（商品卡风） */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.feature {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px 28px;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s, background 0.25s;
  overflow: hidden;
}

.feature::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--brand), var(--brand-soft));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s;
}

.feature:hover {
  transform: translateY(-4px);
  box-shadow: 0 28px 54px -28px rgba(0, 0, 0, 0.7);
  border-color: var(--line-strong);
  background: var(--surface-2);
}

.feature:hover::before {
  transform: scaleX(1);
}

.feature__icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(255, 77, 46, 0.12);
  color: var(--brand);
  margin-bottom: 18px;
}

.feature h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.feature p {
  font-size: 14.5px;
  color: var(--ink-soft);
  line-height: 1.65;
}

/* ---------- showcase：单次 / 批量 双功能详解 ---------- */
.showcase {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(32px, 4vw, 56px);
  align-items: center;
}

.showcase + .showcase {
  margin-top: clamp(56px, 7vw, 96px);
}

.showcase--reverse {
  grid-template-columns: 1.1fr 0.9fr;
}

.showcase--reverse .showcase__visual {
  order: 2;
}

.showcase__kicker {
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--brand-soft);
  font-weight: 700;
}

.showcase__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-top: 12px;
}

.showcase__lede {
  margin-top: 18px;
  color: var(--ink-soft);
  font-size: 15.5px;
  line-height: 1.75;
  max-width: 46ch;
}

.showcase__list {
  margin-top: 24px;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.showcase__list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 14.5px;
  color: var(--ink-soft);
  line-height: 1.6;
}

.showcase__list li::before {
  content: '';
  flex-shrink: 0;
  width: 7px;
  height: 7px;
  margin-top: 9px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 4px rgba(255, 77, 46, 0.15);
}

.showcase__list strong {
  color: var(--ink);
  font-weight: 700;
}

/* 批量组合视觉：N × M */
.combo {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(24px, 3vw, 36px);
  position: relative;
  overflow: hidden;
}

.combo::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(420px 260px at 80% 0%, rgba(255, 77, 46, 0.12), transparent 65%);
  pointer-events: none;
}

.combo__formula {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  padding: 8px 0 24px;
}

.combo__pool {
  text-align: center;
}

.combo__pool-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 5vw, 56px);
  line-height: 1;
  color: var(--ink);
  letter-spacing: -0.04em;
}

.combo__pool-label {
  margin-top: 8px;
  font-size: 12.5px;
  color: var(--ink-faint);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
}

.combo__op {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 34px;
  color: var(--brand);
  line-height: 1;
}

.combo__equal {
  color: var(--ink-faint);
}

.combo__result {
  position: relative;
  text-align: center;
  border-top: 1px dashed var(--line-strong);
  padding-top: 22px;
}

.combo__result b {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 3.4vw, 40px);
  color: var(--brand);
  letter-spacing: -0.02em;
}

.combo__result span {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--ink-soft);
}

/* 单次换衣视觉：before → after */
.swap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.swap__card {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 3 / 4;
  flex: 1 1 clamp(80px, 26%, 130px);
  max-width: 150px;
  min-width: 80px;
  border: 1px solid var(--line);
  display: flex;
  align-items: flex-end;
  padding: 16px;
  color: #fff;
  background: var(--surface);
  box-shadow: 0 24px 50px -26px rgba(0, 0, 0, 0.7);
}

.swap__card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.swap__card-tag {
  position: relative;
  z-index: 1;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(4px);
  padding: 5px 10px;
  border-radius: 6px;
}

.swap__arrow {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  box-shadow: 0 10px 24px -10px var(--brand-glow);
  flex: 0 0 auto;
}

.swap__caption {
  flex: 1 0 100%;
  text-align: center;
  font-size: 13px;
  color: var(--ink-faint);
  margin-top: 4px;
}

/* ---------- workflow 步骤 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.step {
  position: relative;
  padding: 0 22px 0 0;
}

.step__num {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 800;
  font-size: 40px;
  color: var(--brand);
  line-height: 1;
}

.step h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  margin: 14px 0 6px;
  letter-spacing: -0.01em;
}

.step p {
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.6;
}

.step:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 22px;
  width: 1px;
  height: 60px;
  background: var(--line);
}

/* ---------- 积分套餐价格表 ---------- */
.plans {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}

.plan {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 20px 24px;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s, border-color 0.25s, background 0.25s;
}

.plan:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  background: var(--surface-2);
}

.plan--featured {
  border-color: var(--brand);
  background: linear-gradient(180deg, rgba(255, 77, 46, 0.1), var(--surface) 60%);
  box-shadow: 0 24px 50px -28px var(--brand-glow);
}

.plan__badge {
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--brand);
  color: #fff;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 4px 12px;
  border-radius: 999px;
  white-space: nowrap;
}

.plan__credits {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 26px;
  color: var(--ink);
  letter-spacing: -0.02em;
  line-height: 1;
}

.plan__credits small {
  display: block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 11.5px;
  color: var(--ink-faint);
  margin-top: 6px;
  letter-spacing: 0.04em;
}

.plan__price {
  margin-top: 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 30px;
  color: var(--brand);
  line-height: 1;
}

.plan__price small {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-faint);
}

.plan__bonus {
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--mint);
  font-weight: 600;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.plan__bonus--none {
  color: var(--ink-faint);
}

/* ---------- 平台下载 ---------- */
.platforms {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.platform {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 26px;
  transition: transform 0.25s, border-color 0.25s, background 0.25s;
}

.platform:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  background: var(--surface-2);
}

.platform__icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.05);
  color: var(--ink);
  flex-shrink: 0;
}

.platform__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
}

.platform__meta {
  font-size: 12.5px;
  color: var(--ink-faint);
  margin-top: 2px;
}

/* ---------- stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat {
  border-left: 2px solid var(--brand);
  padding-left: 18px;
}

.stat__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1;
  color: var(--ink);
  letter-spacing: -0.03em;
}

.stat__label {
  margin-top: 8px;
  font-size: 13.5px;
  color: var(--ink-faint);
  letter-spacing: 0.03em;
}

/* ---------- CTA band ---------- */
.band {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  padding: clamp(44px, 6vw, 76px);
  background:
    radial-gradient(600px 320px at 85% 10%, rgba(255, 77, 46, 0.28), transparent 60%),
    linear-gradient(135deg, #14141a 0%, #0d0d11 100%);
  border: 1px solid var(--line-strong);
}

.band::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(135deg, rgba(255, 77, 46, 0.06) 0 2px, transparent 2px 7px);
  pointer-events: none;
}

.band__content {
  position: relative;
  z-index: 1;
  max-width: 60ch;
}

.band h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.band p {
  margin-top: 14px;
  color: var(--ink-soft);
  font-size: 15.5px;
}

.band .btn {
  margin-top: 26px;
}

/* ---------- footer ---------- */
.site-footer {
  position: relative;
  z-index: 2;
  background: var(--bg);
  color: var(--ink-soft);
  padding: 56px 0 28px;
  font-size: 13.5px;
  border-top: 1px solid var(--line);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line);
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
}

.footer__about {
  margin-top: 16px;
  color: var(--ink-faint);
  max-width: 42ch;
  font-size: 13px;
  line-height: 1.7;
}

.footer__col h5 {
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

.footer__col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__col a:hover {
  color: var(--brand-soft);
}

.footer__bottom {
  padding-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  align-items: center;
  justify-content: space-between;
  color: var(--ink-faint);
  font-size: 12.5px;
}

.footer__beian {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  align-items: center;
}

.footer__beian a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s;
}

.footer__beian a:hover {
  color: var(--brand-soft);
}

.beian-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.placeholder {
  color: var(--brand-soft);
  font-weight: 600;
}

/* ---------- legal 文档样式 ---------- */
.legal {
  padding: clamp(48px, 7vw, 88px) 0 64px;
  position: relative;
  z-index: 2;
}

.legal__head {
  border-bottom: 1px solid var(--line);
  padding-bottom: 28px;
  margin-bottom: 36px;
}

.legal__kicker {
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--brand-soft);
  font-weight: 700;
}

.legal__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 4.4vw, 52px);
  letter-spacing: -0.02em;
  margin-top: 10px;
}

.legal__meta {
  margin-top: 14px;
  color: var(--ink-faint);
  font-size: 13.5px;
}

.prose {
  max-width: 760px;
}

.prose h2 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  margin: 40px 0 14px;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.prose h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  margin: 26px 0 10px;
  color: var(--ink);
}

.prose p,
.prose li {
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.85;
}

.prose p {
  margin-bottom: 14px;
}

.prose ul,
.prose ol {
  padding-left: 1.3em;
  margin-bottom: 14px;
}

.prose li {
  margin-bottom: 8px;
}

.prose a {
  color: var(--brand-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose strong {
  color: var(--ink);
  font-weight: 700;
}

.prose .note {
  background: rgba(255, 77, 46, 0.08);
  border-left: 3px solid var(--brand);
  padding: 14px 18px;
  border-radius: 6px;
  font-size: 14px;
  margin: 22px 0;
  color: var(--ink-soft);
}

/* 关于页：特性概览卡 */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 8px;
}

.about-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 22px 20px;
}

.about-card h3 {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
}

.about-card p {
  font-size: 13.5px;
  color: var(--ink-soft);
  line-height: 1.6;
  margin: 0;
}

/* ---------- 动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html {
    scroll-behavior: auto;
  }
  .tile:hover,
  .feature:hover,
  .plan:hover,
  .platform:hover {
    transform: none;
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hero__grid {
    grid-template-columns: 1fr;
  }
  .hero__stage {
    max-width: 520px;
  }
  .features {
    grid-template-columns: repeat(2, 1fr);
  }
  .showcase,
  .showcase--reverse {
    grid-template-columns: 1fr;
  }
  .showcase--reverse .showcase__visual {
    order: 0;
  }
  .plans {
    grid-template-columns: repeat(2, 1fr);
  }
  .platforms {
    grid-template-columns: 1fr;
  }
  .steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px 0;
  }
  .step:nth-child(2)::after,
  .step:last-child::after {
    display: none;
  }
  .stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
  }
  .about-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .nav__links {
    position: fixed;
    inset: 72px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-soft);
    border-bottom: 1px solid var(--line);
    padding: 12px var(--gutter) 20px;
    transform: translateY(-130%);
    transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 24px 48px -24px rgba(0, 0, 0, 0.6);
  }

  .nav__links.is-open {
    transform: translateY(0);
  }

  .nav__links a {
    padding: 14px 8px;
    border-radius: 0;
    border-bottom: 1px solid var(--line);
  }

  .nav__toggle {
    display: grid;
    place-items: center;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .swap {
    gap: 10px;
  }
}

@media (max-width: 560px) {
  .features,
  .plans,
  .about-grid {
    grid-template-columns: 1fr;
  }
  .stats {
    grid-template-columns: 1fr 1fr;
  }
  .hero__stage {
    grid-template-columns: repeat(2, 1fr);
  }
  .tile--down {
    margin-top: 0;
  }
}