/* MatrixPen Official Website - Global Styles (墨写/东方笔墨美学版) */

/* === CSS Variables === */
:root {
  /* 墨色基底 */
  --ink-deep: #0a0a10;
  --ink: #14141e;
  --ink-light: #2a2a38;
  --ink-mid: #3d3d50;

  /* 品牌色 - 朱砂红 */
  --vermillion: #c23a2b;
  --vermillion-light: rgba(194,58,43,0.12);
  --vermillion-glow: rgba(194,58,43,0.35);
  --vermillion-hover: #a83224;

  /* 靛青 */
  --indigo: #2c3e5a;
  --indigo-light: rgba(44,62,90,0.12);
  --indigo-soft: #3d5a80;

  /* 金色点缀 */
  --gold: #c9a84c;
  --gold-light: rgba(201,168,76,0.12);

  /* 背景 */
  --bg-deep: #0b0f1a;
  --bg: #111622;
  --bg-card: #161c2e;
  --bg-card-hover: #1c2336;
  --surface: rgba(17,22,34,0.85);

  /* 文字 */
  --ink-warm: #ebe7df;
  --ink-dim: #9a97a8;
  --ink-muted: #6b6878;
  --ink2: #7a7788;
  --muted: #8a8798;
  --ink-paper: #f3efe8;

  /* 边框 */
  --rule: rgba(255,255,255,0.06);
  --rule-strong: rgba(255,255,255,0.12);

  /* 功能色 */
  --success: #3cb878;
  --success-soft: rgba(60,184,120,0.12);
  --warn: #d4a843;
  --warn-soft: rgba(212,168,67,0.12);

  /* 兼容旧变量 (accent = vermillion) */
  --accent: #c23a2b;
  --accent-glow: rgba(194,58,43,0.35);
  --accent-soft: rgba(194,58,43,0.12);
  --accent2: #a83224;
  --accent2-light: rgba(168,50,36,0.12);

  /* 字体 */
  --font-display: 'Noto Serif CJK SC','SimSun','STSong','PingFang SC',serif;
  --font: 'Noto Sans CJK SC','Microsoft YaHei','PingFang SC','Hiragino Sans GB',sans-serif;
  --font-mono: 'Cascadia Code','Fira Code','Consolas',monospace;

  /* 尺寸 */
  --max: 1200px;
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* 动效 */
  --ease: cubic-bezier(0.22,0.61,0.36,1);
  --ease-out: cubic-bezier(0.16,1,0.3,1);
  --ease-spring: cubic-bezier(0.34,1.56,0.64,1);
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font);
  color: var(--ink-warm);
  background: var(--bg-deep);
  line-height: 1.75;
  overflow-x: hidden;
}
/* 墨韵光晕 */
body::before {
  content: '';
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background:
    radial-gradient(ellipse 70% 50% at 30% 0%, rgba(194,58,43,0.05), transparent),
    radial-gradient(ellipse 50% 40% at 80% 60%, rgba(44,62,90,0.08), transparent),
    radial-gradient(ellipse 40% 30% at 10% 90%, rgba(201,168,76,0.03), transparent);
  pointer-events: none; z-index: 0;
}
/* 宣纸纹理 */
body::after {
  content: '';
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
  pointer-events: none; z-index: 0;
}
a { color: var(--vermillion); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--gold); }
img { max-width: 100%; display: block; }
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--ink-warm);
  line-height: 1.25;
}

/* === Navigation === */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 0 2rem; height: 68px;
  display: flex; align-items: center; justify-content: space-between;
  transition: all .4s var(--ease);
}
.nav.scrolled {
  background: rgba(11,15,26,0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 1px 0 var(--rule), 0 4px 24px rgba(0,0,0,.3);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}
.nav-brand {
  display: flex; align-items: center; gap: .7rem;
  cursor: pointer;
}
.nav-logo {
  width: 36px; height: 36px; border-radius: 9px;
  background: linear-gradient(135deg, var(--vermillion), #d4564a);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 800; font-size: .9rem;
  font-family: var(--font-display);
  box-shadow: 0 0 20px var(--vermillion-glow);
}
.nav-brand-text {
  font-family: var(--font-display); font-weight: 700;
  font-size: 1.15rem; color: var(--ink-warm); letter-spacing: .04em;
}
.nav-brand-sub {
  font-size: .7rem; color: var(--ink-muted);
  margin-left: .3rem; display: none; letter-spacing: .08em;
}
@media (min-width: 800px) { .nav-brand-sub { display: inline; } }
.nav-links { display: flex; align-items: center; gap: .2rem; }
.nav-link {
  padding: .4rem .9rem; border-radius: 6px;
  font-size: .85rem; color: var(--ink-dim);
  cursor: pointer; transition: all .2s var(--ease);
  border: none; background: none; font-family: var(--font);
}
.nav-link:hover { color: var(--ink-warm); background: rgba(255,255,255,.04); }
.nav-cta {
  padding: .5rem 1.5rem; border-radius: 6px;
  font-size: .85rem; font-weight: 600;
  background: var(--vermillion); color: #fff;
  border: none; cursor: pointer; font-family: var(--font);
  transition: all .25s var(--ease); margin-left: .5rem;
  box-shadow: 0 0 20px var(--vermillion-glow);
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 32px rgba(194,58,43,.5);
  background: var(--vermillion-hover);
}
.nav-mobile-btn {
  display: none; background: none; border: none;
  cursor: pointer; padding: .5rem; color: var(--ink-warm); font-size: 1.3rem;
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-mobile-btn { display: block; }
  .nav { padding: 0 1rem; }
}

/* === Hero === */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  padding: 8rem 2rem 4rem;
  overflow: hidden;
}
.hero-bg {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background:
    radial-gradient(ellipse 60% 50% at 20% 20%, rgba(194,58,43,0.08), transparent),
    radial-gradient(ellipse 50% 40% at 80% 80%, rgba(44,62,90,0.1), transparent),
    linear-gradient(160deg, var(--ink-deep) 0%, var(--ink) 40%, var(--ink-light) 100%);
  z-index: 0;
}
/* 矩阵网格装饰 */
.hero-bg::before {
  content: '';
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 59px, rgba(255,255,255,.015) 59px, rgba(255,255,255,.015) 60px),
    repeating-linear-gradient(90deg, transparent, transparent 59px, rgba(255,255,255,.015) 59px, rgba(255,255,255,.015) 60px);
  z-index: 0;
}
/* 墨韵光晕 */
.hero-bg::after {
  content: '';
  position: absolute;
  top: 10%; right: -10%; width: 600px; height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(194,58,43,.08) 0%, transparent 70%);
  z-index: 0;
}
.hero-inner {
  position: relative; z-index: 1;
  max-width: var(--max); margin: 0 auto; width: 100%;
  display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center;
}
.hero-content {}
.hero-badge {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .3rem 1rem; border-radius: 100px;
  border: 1px solid var(--rule-strong);
  background: rgba(255,255,255,.03);
  font-size: .78rem; color: var(--ink-dim); margin-bottom: 2rem;
  animation: fadeInUp .8s var(--ease-out) both;
}
.hero-badge-dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--success);
  box-shadow: 0 0 8px rgba(60,184,120,.5); animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .4; } }

.hero-label {
  font-size: .8rem; color: var(--ink-muted); letter-spacing: .1em;
  text-transform: uppercase; margin-bottom: 1rem;
  animation: fadeInUp .8s var(--ease-out) .1s both;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 900; line-height: 1.15;
  letter-spacing: -.01em; margin-bottom: 1.5rem;
  animation: fadeInUp .8s var(--ease-out) .15s both;
}
.hero-title-line { display: block; }
.hero-title-accent {
  background: linear-gradient(135deg, var(--vermillion) 0%, #e06050 60%, var(--gold) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: clamp(.95rem, 1.5vw, 1.15rem);
  color: var(--ink-dim); line-height: 1.75;
  max-width: 480px; margin-bottom: 2.5rem;
  animation: fadeInUp .8s var(--ease-out) .25s both;
}
.hero-actions {
  display: flex; gap: 1rem; flex-wrap: wrap;
  animation: fadeInUp .8s var(--ease-out) .35s both;
}
.btn-primary {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .9rem 2.2rem; border-radius: 8px;
  font-weight: 700; font-size: .95rem;
  background: var(--vermillion); color: #fff;
  border: none; cursor: pointer; font-family: var(--font);
  transition: all .3s var(--ease);
  box-shadow: 0 0 32px var(--vermillion-glow);
  position: relative; overflow: hidden;
}
.btn-primary::before {
  content: '';
  position: absolute; top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.15), transparent);
  transition: left .6s;
}
.btn-primary:hover::before { left: 100%; }
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 48px rgba(194,58,43,.5);
  background: var(--vermillion-hover);
}
.btn-ghost {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .9rem 2.2rem; border-radius: 8px;
  font-weight: 600; font-size: .95rem;
  background: transparent; color: var(--ink-warm);
  border: 1px solid var(--rule-strong);
  cursor: pointer; font-family: var(--font);
  transition: all .3s var(--ease);
}
.btn-ghost:hover {
  border-color: rgba(255,255,255,.2);
  background: rgba(255,255,255,.04);
  transform: translateY(-2px);
}
.hero-visual {
  display: flex; align-items: center; justify-content: center;
  animation: fadeInUp .8s var(--ease-out) .3s both;
}
.hero-mockup {
  width: 100%; max-width: 520px;
  background: var(--bg-card);
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0,0,0,.4), 0 0 0 1px var(--rule);
  position: relative;
}
.hero-mockup-header {
  display: flex; align-items: center; gap: .5rem;
  padding: .75rem 1rem;
  background: rgba(0,0,0,.3);
  border-bottom: 1px solid var(--rule);
}
.mockup-dot { width: 10px; height: 10px; border-radius: 50%; }
.mockup-dot--red { background: #ff5f57; }
.mockup-dot--yellow { background: #febc2e; }
.mockup-dot--green { background: #28c840; }
.mockup-title { font-size: .75rem; color: var(--ink-muted); margin-left: .5rem; }
.hero-mockup-body { padding: 1.5rem; }
.mockup-strategy {
  background: rgba(194,58,43,.06);
  border: 1px solid rgba(194,58,43,.15);
  border-radius: var(--radius);
  padding: 1rem 1.25rem; margin-bottom: 1rem;
}
.mockup-strategy-label {
  font-size: .7rem; color: var(--vermillion); font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase; margin-bottom: .5rem;
}
.mockup-strategy-text { font-size: .88rem; color: var(--ink-warm); line-height: 1.6; }
.mockup-dims { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
.mockup-dim {
  background: rgba(255,255,255,.02);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: .75rem 1rem;
}
.mockup-dim-title { font-size: .7rem; color: var(--ink-muted); margin-bottom: .3rem; font-weight: 600; letter-spacing: .05em; }
.mockup-dim-value { font-size: .82rem; color: var(--ink-dim); line-height: 1.5; }
.hero-mockup-platforms { display: flex; gap: .5rem; margin-top: 1rem; flex-wrap: wrap; }
.platform-chip {
  display: flex; align-items: center; gap: .4rem;
  padding: .35rem .75rem; border-radius: 100px;
  background: rgba(255,255,255,.03);
  border: 1px solid var(--rule);
  font-size: .75rem; color: var(--ink-dim);
  transition: all .3s var(--ease);
}
.platform-chip:hover { border-color: var(--rule-strong); background: var(--bg-card-hover); }
.platform-dot { width: 7px; height: 7px; border-radius: 50%; }
.platform-dot--wechat { background: #07c160; }
.platform-dot--weibo { background: #e6162d; }
.platform-dot--xiaohongshu { background: #fe2c55; }
.platform-dot--toutiao { background: #ff6a00; }
.platform-dot--baijia { background: #2b7de9; }

.hero-stats {
  display: flex; gap: 2.5rem; margin-top: 3rem;
  padding-top: 2rem; border-top: 1px solid var(--rule);
  animation: fadeInUp .8s var(--ease-out) .4s both;
}
.hero-stat-value {
  font-family: var(--font-display);
  font-size: 1.8rem; font-weight: 900; color: var(--ink-warm);
}
.hero-stat-value small { font-size: .55em; color: var(--ink-muted); font-weight: 400; }
.hero-stat-label { font-size: .78rem; color: var(--ink-muted); margin-top: .25rem; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 3rem; }
  .hero-visual { order: -1; }
  .hero-mockup { max-width: 400px; }
  .hero-stats { flex-wrap: wrap; gap: 1.5rem; }
}
@media (max-width: 768px) {
  .hero { padding: 6rem 1.25rem 3rem; min-height: auto; }
}

/* === Sections === */
.section { padding: 6rem 2rem; position: relative; z-index: 1; }
.section-inner { max-width: var(--max); margin: 0 auto; }
.section-label {
  font-size: .72rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: .14em; color: var(--vermillion); margin-bottom: .75rem;
  text-align: center;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.5rem);
  font-weight: 800; margin-bottom: 1rem;
  letter-spacing: -.01em;
  text-align: center;
}
.section-title-accent {
  background: linear-gradient(135deg, var(--vermillion), var(--gold));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-desc {
  font-size: 1.05rem; color: var(--ink-dim);
  max-width: 600px; margin: 0 auto 3rem; line-height: 1.75;
  text-align: center;
}
.section-alt { background: var(--bg); }

/* === Scroll Reveal === */
.reveal { opacity: 0; transform: translateY(40px); transition: all .7s var(--ease-out); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }
.reveal-delay-4 { transition-delay: .4s; }

/* === Problem Cards (with illustrations) === */
.problem-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
@media (max-width: 768px) { .problem-grid { grid-template-columns: 1fr; } }
.problem-card {
  background: var(--bg-card); border: 1px solid var(--rule);
  border-radius: var(--radius); padding: 0;
  transition: all .4s var(--ease); position: relative; overflow: hidden;
}
.problem-card::before {
  content: '';
  position: absolute; top: 0; left: 0; width: 100%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--vermillion), transparent);
  opacity: 0; transition: opacity .4s;
}
.problem-card:hover::before { opacity: 1; }
.problem-card:hover {
  border-color: var(--rule-strong);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,.3);
}
.problem-illustration {
  width: 100%; height: 200px; overflow: hidden;
  border-bottom: 1px solid var(--rule);
}
.problem-illustration img,
.problem-illustration svg { width: 100%; height: 100%; display: block; }
@media (max-width: 768px) { .problem-illustration { height: 160px; } }
.problem-card-body { padding: 1.5rem; }
.problem-card h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: .5rem; font-family: var(--font); }
.problem-card p { font-size: .88rem; color: var(--ink-dim); line-height: 1.65; }

/* === Feature Cards === */
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
@media (max-width: 768px) { .feature-grid { grid-template-columns: 1fr; } }
.feature-card {
  background: var(--bg-card); border: 1px solid var(--rule);
  border-radius: var(--radius); overflow: hidden;
  transition: all .4s var(--ease); cursor: default;
}
.feature-card:hover {
  border-color: var(--rule-strong);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,.35);
}
.feature-card-img {
  width: 100%; height: 180px;
  background: linear-gradient(135deg, var(--ink-light), var(--ink-mid));
  display: flex; align-items: center; justify-content: center;
  border-bottom: 1px solid var(--rule);
  position: relative; overflow: hidden;
}
.feature-card-img::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 50%, var(--bg-card) 100%);
}
.feature-card-img-icon {
  font-size: 3rem; position: relative; z-index: 1; opacity: .6;
}
.feature-card-body { padding: 1.75rem; }
.feature-card-body h4 { font-size: 1.2rem; font-weight: 700; margin-bottom: .5rem; font-family: var(--font); }
.feature-card-body p { font-size: .9rem; color: var(--ink-dim); line-height: 1.65; margin-bottom: 1rem; }
.feature-tags { display: flex; gap: .4rem; flex-wrap: wrap; }
.feature-tag { font-size: .72rem; padding: .2em .65em; border-radius: 4px; font-weight: 600; }
.feature-tag--red { background: var(--vermillion-light); color: var(--vermillion); }
.feature-tag--gold { background: var(--gold-light); color: var(--gold); }
.feature-tag--blue { background: var(--indigo-light); color: #6b8aad; }
.feature-tag--green { background: var(--success-soft); color: var(--success); }

/* === How It Works (Steps) === */
.steps {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem;
  position: relative;
}
.steps::before {
  content: '';
  position: absolute; top: 40px; left: 12.5%; width: 75%; height: 1px;
  background: linear-gradient(90deg, var(--vermillion), var(--gold), var(--vermillion));
  opacity: .3;
}
@media (max-width: 900px) {
  .steps { grid-template-columns: repeat(2, 1fr); }
  .steps::before { display: none; }
}
@media (max-width: 500px) { .steps { grid-template-columns: 1fr; } }
.step {
  text-align: center; position: relative; z-index: 1;
  padding: 2rem 1.25rem;
  background: var(--bg-card); border: 1px solid var(--rule);
  border-radius: var(--radius);
  transition: all .4s var(--ease);
}
.step:hover { border-color: var(--rule-strong); transform: translateY(-4px); }
.step-num {
  width: 48px; height: 48px; border-radius: 50%;
  background: linear-gradient(135deg, var(--vermillion), #d4564a);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1.1rem; margin: 0 auto 1rem;
  font-family: var(--font-display);
  box-shadow: 0 0 24px var(--vermillion-glow);
}
.step h4 { font-size: 1rem; font-weight: 700; margin-bottom: .5rem; font-family: var(--font); }
.step p { font-size: .82rem; color: var(--ink-dim); line-height: 1.6; }

/* === Platforms (26 分组展示) === */
.platforms { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin: 2rem 0; }
.platform-chip {
  display: flex; align-items: center; gap: .5rem;
  padding: .6rem 1.2rem; border-radius: 100px;
  background: var(--bg-card); border: 1px solid var(--rule);
  font-size: .85rem; color: var(--ink-dim);
  transition: all .3s var(--ease);
}
.platform-chip:hover {
  border-color: var(--rule-strong);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}
.platform-dot { width: 9px; height: 9px; border-radius: 50%; }

/* 平台分组展示 */
.platform-groups { display: flex; flex-direction: column; gap: 2.5rem; }
.platform-group {}
.platform-group-header { display: flex; align-items: center; gap: .75rem; margin-bottom: 1rem; }
.platform-group-icon {
  width: 36px; height: 36px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
}
.platform-group-icon--video { background: rgba(235,87,87,.12); color: #eb5757; }
.platform-group-icon--social { background: rgba(60,184,120,.12); color: #3cb878; }
.platform-group-icon--tech { background: rgba(44,62,90,.2); color: #6b8aad; }
.platform-group-icon--finance { background: rgba(201,168,76,.12); color: #c9a84c; }
.platform-group-title { font-size: 1rem; font-weight: 700; color: var(--ink-warm); font-family: var(--font); }
.platform-group-count { font-size: .75rem; color: var(--ink-muted); }
.platform-chips-row { display: flex; flex-wrap: wrap; gap: .6rem; }
.platform-chip-lg {
  display: flex; align-items: center; gap: .6rem;
  padding: .6rem 1.1rem; border-radius: 10px;
  background: var(--bg-card); border: 1px solid var(--rule);
  font-size: .85rem; color: var(--ink-dim);
  transition: all .3s var(--ease); cursor: default;
}
.platform-chip-lg:hover {
  border-color: var(--rule-strong); background: var(--bg-card-hover);
  transform: translateY(-2px);
}
.platform-chip-lg img {
  width: 20px; height: 20px; border-radius: 4px;
  object-fit: cover; flex-shrink: 0;
}
.platform-chip-lg .chip-placeholder {
  width: 20px; height: 20px; border-radius: 4px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: .7rem; font-weight: 800;
  background: var(--ink-light); color: var(--ink-dim);
}
.platform-note {
  margin-top: 1.5rem; text-align: center;
  font-size: .82rem; color: var(--ink-muted);
  padding: .75rem 1.25rem; background: rgba(255,255,255,.02);
  border: 1px solid var(--rule); border-radius: 8px;
  display: inline-flex; align-items: center; gap: .5rem;
}

/* === Pricing === */
.pricing-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
@media (max-width: 900px) { .pricing-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 500px) { .pricing-grid { grid-template-columns: 1fr; } }
.pricing-card {
  background: var(--bg-card); border: 1px solid var(--rule);
  border-radius: var(--radius); padding: 1.75rem;
  text-align: center; transition: all .4s var(--ease); position: relative;
}
.pricing-card:hover { border-color: var(--rule-strong); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,.3); }
.pricing-card.featured {
  border-color: var(--vermillion);
  background: linear-gradient(180deg, var(--bg-card), rgba(194,58,43,.06));
}
.pricing-card.featured::before {
  content: '最受欢迎';
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--vermillion); color: #fff; font-size: .68rem; font-weight: 700;
  padding: .2em .7em; border-radius: 4px;
  box-shadow: 0 0 16px var(--vermillion-glow);
}
.pricing-name { font-size: .9rem; color: var(--ink-muted); margin-bottom: .5rem; font-weight: 600; }
.pricing-credits { font-size: 1.8rem; font-weight: 900; color: var(--ink-warm); margin-bottom: .25rem; font-family: var(--font-display); }
.pricing-price { font-size: 1rem; color: var(--vermillion); font-weight: 700; margin-bottom: .75rem; }
.pricing-desc { font-size: .8rem; color: var(--ink-dim); line-height: 1.5; margin-bottom: 1.25rem; }
.pricing-btn {
  display: block; width: 100%; padding: .65rem; border-radius: 6px;
  font-size: .85rem; font-weight: 600; cursor: pointer;
  transition: all .25s var(--ease); border: none; font-family: var(--font);
}
.pricing-btn--primary { background: var(--vermillion); color: #fff; box-shadow: 0 0 20px var(--vermillion-glow); }
.pricing-btn--primary:hover { box-shadow: 0 0 32px rgba(194,58,43,.5); transform: translateY(-1px); }
.pricing-btn--ghost { background: transparent; color: var(--ink-dim); border: 1px solid var(--rule-strong); }
.pricing-btn--ghost:hover { border-color: var(--ink-dim); color: var(--ink-warm); }

/* === CTA === */
.cta-section {
  position: relative; padding: 8rem 2rem; text-align: center; overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background:
    radial-gradient(ellipse 50% 60% at 50% 50%, rgba(194,58,43,.1), transparent),
    linear-gradient(180deg, var(--bg-deep), var(--ink-deep));
  z-index: 0;
}
.cta-inner { position: relative; z-index: 1; max-width: 640px; margin: 0 auto; }
.cta-inner h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 900; margin-bottom: 1rem; }
.cta-inner h2 span {
  background: linear-gradient(135deg, var(--vermillion), var(--gold));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cta-inner p { font-size: 1.1rem; color: var(--ink-dim); margin-bottom: 2.5rem; line-height: 1.75; }
.cta-trust { margin-top: 1.5rem; font-size: .82rem; color: var(--ink-muted); }

/* === Footer === */
.footer {
  border-top: 1px solid var(--rule); padding: 3rem 2rem 2rem;
  background: var(--bg); position: relative; z-index: 1;
}
.footer-inner {
  max-width: var(--max); margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem;
}
.footer-brand { font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; margin-bottom: .5rem; color: var(--ink-warm); }
.footer-slogan { font-size: .82rem; color: var(--ink-muted); margin-bottom: .75rem; }
.footer-col h5 { font-size: .82rem; font-weight: 700; margin-bottom: .75rem; color: var(--ink-warm); }
.footer-col a {
  display: block; font-size: .82rem; color: var(--ink-muted);
  margin-bottom: .4rem; cursor: pointer; transition: color .2s;
}
.footer-col a:hover { color: var(--vermillion); }
.footer-bottom {
  max-width: var(--max); margin: 1.5rem auto 0; padding-top: 1rem;
  border-top: 1px solid var(--rule); font-size: .75rem; color: var(--ink-muted);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem;
}
@media (max-width: 768px) { .footer-inner { grid-template-columns: 1fr 1fr; } }

/* === Modal === */
.modal-overlay {
  display: none; position: fixed; top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,.7); backdrop-filter: blur(8px);
  z-index: 2000; align-items: center; justify-content: center;
}
.modal-overlay.show { display: flex; }
.modal-card {
  background: var(--bg-card); border: 1px solid var(--rule-strong);
  border-radius: var(--radius-lg); padding: 2.5rem 2rem;
  max-width: 440px; width: 90%; position: relative;
  animation: modalIn .4s var(--ease-spring);
  box-shadow: 0 24px 64px rgba(0,0,0,.5);
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(.9) translateY(30px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-close {
  position: absolute; top: 1rem; right: 1rem;
  background: none; border: none; font-size: 1.3rem;
  cursor: pointer; color: var(--ink-muted); padding: .25rem;
  transition: color .2s; line-height: 1;
}
.modal-close:hover { color: var(--ink-warm); }
.modal-slogan { text-align: center; margin-bottom: 1.5rem; }
.modal-slogan h3 {
  font-family: var(--font-display); font-size: 1.5rem; margin-bottom: .35rem;
  background: linear-gradient(135deg, var(--vermillion), var(--gold));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.modal-slogan p { font-size: .85rem; color: var(--ink-dim); }
.modal-benefits { display: flex; flex-direction: column; gap: .5rem; margin-bottom: 1.5rem; }
.modal-benefit {
  font-size: .85rem; color: var(--ink-warm);
  padding: .55rem .85rem; background: rgba(255,255,255,.03);
  border: 1px solid var(--rule); border-radius: 6px;
}
.modal-form { display: flex; flex-direction: column; gap: .7rem; margin-bottom: 1rem; }
.modal-input {
  padding: .7rem 1rem; border: 1px solid var(--rule-strong);
  border-radius: 6px; font-size: .88rem;
  background: rgba(255,255,255,.03); color: var(--ink-warm);
  font-family: var(--font); transition: border-color .2s;
}
.modal-input:focus { outline: none; border-color: var(--vermillion); box-shadow: 0 0 0 3px var(--vermillion-light); }
.modal-input::placeholder { color: var(--ink-muted); }
.modal-submit {
  width: 100%; padding: .8rem; background: var(--vermillion); color: #fff;
  border: none; border-radius: 6px; font-size: .95rem; font-weight: 700;
  cursor: pointer; font-family: var(--font); transition: all .3s var(--ease);
  box-shadow: 0 0 24px var(--vermillion-glow);
}
.modal-submit:hover { box-shadow: 0 0 40px rgba(194,58,43,.5); }
.modal-trust { text-align: center; font-size: .75rem; color: var(--ink-muted); margin-top: .5rem; }
.modal-privacy { text-align: center; font-size: .7rem; color: var(--ink-muted); margin-top: .35rem; }
.modal-privacy a { color: var(--vermillion); }

/* === Mobile Nav === */
.mobile-nav {
  display: none; position: fixed; top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(10,10,16,.97); backdrop-filter: blur(20px);
  z-index: 1999; flex-direction: column; align-items: center;
  justify-content: center; gap: 2rem;
}
.mobile-nav.show { display: flex; }
.mobile-nav a, .mobile-nav button {
  font-size: 1.2rem; color: var(--ink-dim);
  background: none; border: none;
  cursor: pointer; font-family: var(--font-display);
  transition: color .2s;
}
.mobile-nav a:hover, .mobile-nav button:hover { color: var(--vermillion); }
.mobile-nav .mobile-cta {
  padding: .75rem 2.5rem; border-radius: 8px;
  background: var(--vermillion); color: #fff;
  font-weight: 700; font-size: 1rem;
  box-shadow: 0 0 32px var(--vermillion-glow);
}
.mobile-close {
  position: absolute; top: 1.5rem; right: 1.5rem;
  font-size: 1.5rem; color: var(--ink-dim);
  background: none; border: none; cursor: pointer;
}

/* === Feature Row (Features page) === */
.feature-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center;
}
.feature-text {}
.feature-visual {
  background: var(--bg-card); border: 1px solid var(--rule);
  border-radius: var(--radius-lg); padding: 2rem;
  min-height: 200px; display: flex; align-items: center; justify-content: center;
}
.feature-text h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 800; margin-bottom: 1rem; }
.feature-text p { font-size: 1rem; color: var(--ink-dim); line-height: 1.75; }
@media (max-width: 900px) { .feature-row { grid-template-columns: 1fr; gap: 2rem; } }

/* === Industry Cards (Solutions page) === */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 500px) { .grid-3 { grid-template-columns: 1fr; } }
.industry-card {
  background: var(--bg-card); border: 1px solid var(--rule);
  border-radius: var(--radius); padding: 1.75rem;
  transition: all .4s var(--ease);
}
.industry-card:hover { border-color: var(--rule-strong); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,.3); }
.industry-icon { font-size: 2rem; margin-bottom: 1rem; }
.industry-card h4 { font-size: 1.1rem; font-weight: 700; margin-bottom: .75rem; font-family: var(--font); }
.industry-card p { font-size: .88rem; color: var(--ink-dim); line-height: 1.65; margin-bottom: .5rem; }
.industry-card .pain { font-size: .82rem; color: var(--ink-muted); }
.industry-card .solution { font-size: .82rem; color: var(--ink-dim); }
.industry-link { display: inline-block; margin-top: .75rem; font-size: .82rem; font-weight: 600; color: var(--vermillion); cursor: pointer; transition: color .2s; }
.industry-link:hover { color: var(--gold); }

/* === About Page === */
.about-content { max-width: 720px; }
.about-content p { font-size: 1rem; color: var(--ink-dim); line-height: 1.8; margin-bottom: 1.25rem; }
.about-quote {
  padding: 1.5rem 2rem; margin: 2rem 0;
  border-left: 3px solid var(--vermillion);
  background: var(--vermillion-light);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 1.1rem; font-weight: 600; color: var(--ink-warm);
  font-family: var(--font-display);
}

/* === Utility Spacing === */
.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }

/* === Responsive === */
@media (max-width: 768px) {
  .section { padding: 4rem 1.25rem; }
  .cta-section { padding: 5rem 1.25rem; }
  .platform-chip-lg img { width: 16px; height: 16px; border-radius: 3px; }
  .platform-chip-lg .chip-placeholder { width: 16px; height: 16px; font-size: .6rem; }
  .platform-group-icon { width: 30px; height: 30px; font-size: .95rem; }
  .platform-group-title { font-size: .9rem; }
  .platform-group-count { display: none; }
}