/* ============================================================
   海源智科官网 · 主样式表 v2
   设计原则：简约大气 / 专业 SVG 图标系统 / 克制留白 / 细腻动效
   ============================================================ */

:root {
  --color-bg: #FFFFFF;
  --color-bg-soft: #F7F9FC;
  --color-bg-dark: #0A1628;
  --color-primary: #0A2540;
  --color-primary-2: #0066FF;
  --color-accent: #00D4FF;
  --color-accent-2: #06B6D4;
  --color-text: #0B1526;
  --color-text-2: #46536A;
  --color-text-3: #8595AD;
  --color-border: #E4EAF3;
  --gradient-main: linear-gradient(135deg, #0066FF 0%, #00D4FF 100%);
  --gradient-deep: linear-gradient(135deg, #0A2540 0%, #0F3B6E 55%, #0066FF 100%);
  --shadow-sm: 0 1px 2px rgba(10, 37, 64, 0.05);
  --shadow-md: 0 10px 30px -10px rgba(10, 37, 64, 0.14);
  --shadow-lg: 0 24px 60px -16px rgba(10, 37, 64, 0.22);
  --shadow-blue: 0 14px 34px -10px rgba(0, 102, 255, 0.45);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --container: 1200px;
  --font-sans: "Inter", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

::selection { background: rgba(0, 102, 255, 0.16); }

/* ============ 通用图标系统（SVG） ============ */
.icon-box {
  width: 48px; height: 48px; border-radius: 14px;
  display: inline-flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(0,102,255,0.10), rgba(0,212,255,0.12));
  color: var(--color-primary-2);
  border: 1px solid rgba(0,102,255,0.10);
  flex-shrink: 0;
  transition: all 0.3s ease;
}
.icon-box svg { width: 22px; height: 22px; }
.icon-box.lg { width: 56px; height: 56px; border-radius: 16px; }
.icon-box.lg svg { width: 26px; height: 26px; }
.icon-box.sm { width: 36px; height: 36px; border-radius: 10px; }
.icon-box.sm svg { width: 17px; height: 17px; }
.icon-box.fill {
  background: var(--gradient-main);
  color: #fff;
  border: none;
  box-shadow: var(--shadow-blue);
}
.icon-box.dark {
  background: rgba(255,255,255,0.08);
  color: var(--color-accent);
  border-color: rgba(255,255,255,0.12);
}
.icon-box.plain {
  background: transparent; border: none; padding: 0;
  width: auto; height: auto; border-radius: 0;
}

/* ============ 顶部导航 ============ */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.site-header.scrolled { border-bottom-color: var(--color-border); background: rgba(255,255,255,0.9); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }

.brand { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 800; color: var(--color-primary); letter-spacing: -0.01em; }
.brand-logo { width: 38px; height: 38px; display: inline-flex; filter: drop-shadow(0 4px 10px rgba(0,102,255,0.30)); }
.brand-logo svg { width: 100%; height: 100%; }

.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-link {
  position: relative; padding: 8px 16px; font-size: 15px; font-weight: 500;
  color: var(--color-text-2); border-radius: 999px; transition: all 0.25s;
}
.nav-link:hover { color: var(--color-primary); background: rgba(0, 102, 255, 0.07); }
.nav-link.active { color: var(--color-primary); font-weight: 600; }
.nav-link.active::after {
  content: ""; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%);
  width: 16px; height: 3px; border-radius: 2px; background: var(--gradient-main);
}
.nav-cta {
  margin-left: 10px; padding: 9px 20px; font-size: 14px; font-weight: 600;
  color: #fff; background: var(--gradient-main); border-radius: 999px;
  box-shadow: var(--shadow-blue); transition: all 0.25s;
  display: inline-flex; align-items: center; gap: 6px;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 18px 40px -10px rgba(0, 102, 255, 0.55); }
.nav-cta svg { width: 15px; height: 15px; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 10px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--color-primary); border-radius: 2px; transition: all 0.3s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 30px; font-size: 15px; font-weight: 600; border-radius: 999px;
  transition: all 0.25s ease; cursor: pointer; white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; transition: transform 0.25s; }
.btn:hover svg { transform: translateX(3px); }
.btn-primary { background: var(--gradient-main); color: #fff; box-shadow: var(--shadow-blue); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 20px 44px -10px rgba(0, 102, 255, 0.55); }
.btn-outline { border: 1.5px solid var(--color-border); color: var(--color-text); background: transparent; }
.btn-outline:hover { border-color: var(--color-primary-2); color: var(--color-primary-2); background: rgba(0,102,255,0.04); }
.btn-light { background: #fff; color: var(--color-primary); box-shadow: var(--shadow-md); }
.btn-light:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-ghost-light { border: 1.5px solid rgba(255,255,255,0.35); color: #fff; background: transparent; }
.btn-ghost-light:hover { background: rgba(255,255,255,0.12); border-color: rgba(255,255,255,0.6); }
.btn.sm { padding: 10px 22px; font-size: 14px; }

/* ============ 首页 Hero ============ */
.hero {
  position: relative; padding: 180px 0 110px; overflow: hidden;
  background:
    radial-gradient(900px 480px at 85% -10%, rgba(0, 212, 255, 0.13), transparent 60%),
    radial-gradient(800px 520px at 8% 108%, rgba(0, 102, 255, 0.09), transparent 60%),
    var(--color-bg);
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(10, 37, 64, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 37, 64, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 85% 65% at 50% 40%, black 25%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 85% 65% at 50% 40%, black 25%, transparent 78%);
}
.hero-inner { position: relative; display: grid; grid-template-columns: 1.06fr 0.94fr; gap: 72px; align-items: center; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 7px 16px 7px 8px;
  background: rgba(0, 102, 255, 0.07); border: 1px solid rgba(0, 102, 255, 0.18);
  border-radius: 999px; font-size: 13px; font-weight: 500; color: var(--color-primary-2);
  margin-bottom: 26px;
}
.hero-badge .tag {
  background: var(--gradient-main); color: #fff; font-size: 11px; font-weight: 700;
  padding: 3px 10px; border-radius: 999px; letter-spacing: 0.04em;
}

.hero-title { font-size: clamp(40px, 5.4vw, 62px); font-weight: 800; line-height: 1.16; letter-spacing: -0.02em; color: var(--color-primary); margin-bottom: 24px; }
.gradient { background: var(--gradient-main); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; }
.hero-desc { font-size: 17px; color: var(--color-text-2); max-width: 520px; margin-bottom: 38px; }
.hero-desc strong { color: var(--color-primary); font-weight: 600; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-trust { margin-top: 46px; display: flex; align-items: center; gap: 18px; }
.hero-trust .avatars { display: flex; }
.hero-trust .avatars span {
  width: 36px; height: 36px; border-radius: 50%; border: 2.5px solid #fff;
  margin-left: -10px; display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; color: #fff;
}
.hero-trust .avatars span:first-child { margin-left: 0; }
.hero-trust p { font-size: 13.5px; color: var(--color-text-3); }
.hero-trust p strong { color: var(--color-primary); }

/* Hero 右侧视觉 */
.hero-visual { position: relative; }
.hero-card {
  position: relative; background: #fff; border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); overflow: hidden;
}
.hero-card-head {
  display: flex; align-items: center; gap: 10px; padding: 15px 20px;
  border-bottom: 1px solid var(--color-border); background: var(--color-bg-soft);
}
.hero-card-head .dot { width: 10px; height: 10px; border-radius: 50%; }
.hero-card-head .dot:nth-child(1) { background: #FF5F57; }
.hero-card-head .dot:nth-child(2) { background: #FEBC2E; }
.hero-card-head .dot:nth-child(3) { background: #28C840; }
.hero-card-head .title { margin-left: 6px; font-size: 13px; color: var(--color-text-3); font-weight: 600; display: flex; align-items: center; gap: 6px; }
.hero-card-head .title svg { width: 14px; height: 14px; color: var(--color-primary-2); }
.hero-card-body { padding: 24px; }

.detect-row { display: flex; align-items: center; gap: 13px; padding: 13px 0; border-bottom: 1px dashed var(--color-border); }
.detect-row:last-child { border-bottom: none; }
.detect-row .info { flex: 1; }
.detect-row .info h5 { font-size: 14px; font-weight: 600; color: var(--color-primary); margin-bottom: 3px; }
.detect-row .info p { font-size: 12px; color: var(--color-text-3); }
.pill { font-size: 11px; font-weight: 700; padding: 4px 11px; border-radius: 999px; white-space: nowrap; }
.pill.ok { background: rgba(16, 185, 129, 0.12); color: #059669; }
.pill.warn { background: rgba(245, 158, 11, 0.14); color: #D97706; }
.pill.info { background: rgba(0, 102, 255, 0.10); color: var(--color-primary-2); }

.float-chip {
  position: absolute; background: rgba(255,255,255,0.92); backdrop-filter: blur(12px);
  border: 1px solid var(--color-border); border-radius: 14px; box-shadow: var(--shadow-md);
  padding: 12px 16px; display: flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 600; color: var(--color-primary);
  animation: floatY 5.5s ease-in-out infinite;
}
.float-chip svg { width: 18px; height: 18px; }
.float-chip small { display: block; font-size: 11px; font-weight: 500; color: var(--color-text-3); }
.chip-1 { top: -20px; right: 26px; color: var(--color-primary-2); }
.chip-2 { bottom: 88px; left: -30px; animation-delay: 1.4s; color: #059669; }
.chip-qr {
  bottom: -26px; right: -14px; padding: 12px 14px; animation-delay: 2.4s;
  flex-direction: row; gap: 12px;
}
.chip-qr img { width: 58px; height: 58px; border-radius: 8px; }
.chip-qr .qr-txt strong { display: block; font-size: 13px; color: var(--color-primary); }
.chip-qr .qr-txt span { font-size: 11px; color: var(--color-text-3); font-weight: 500; }
@keyframes floatY { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-11px); } }

/* ============ 数据带 ============ */
.stats-band { padding: 0 0 90px; }
.stats-band .band {
  background: var(--gradient-deep); border-radius: var(--radius-lg);
  padding: 46px 52px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 36px;
  box-shadow: var(--shadow-lg); position: relative; overflow: hidden;
}
.stats-band .band::after {
  content: ""; position: absolute; top: -70px; right: -70px; width: 280px; height: 280px;
  border-radius: 50%; background: radial-gradient(circle, rgba(0,212,255,0.28), transparent 70%);
}
.stat-item { color: #fff; position: relative; }
.stat-item .num { font-size: 42px; font-weight: 800; letter-spacing: -0.02em; line-height: 1.05; display: flex; align-items: baseline; gap: 5px; }
.stat-item .num em { font-style: normal; font-size: 19px; font-weight: 700; color: var(--color-accent); }
.stat-item .label { margin-top: 9px; font-size: 13.5px; color: rgba(255,255,255,0.66); }

/* ============ 区块通用 ============ */
.section { padding: 100px 0; }
.section.soft { background: var(--color-bg-soft); }
.section-head { max-width: 680px; margin: 0 auto 60px; text-align: center; }
.section-head.left { margin: 0 0 52px; text-align: left; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; font-size: 12.5px; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--color-primary-2); margin-bottom: 15px;
}
.eyebrow::before { content: ""; width: 22px; height: 2.5px; border-radius: 2px; background: var(--gradient-main); }
.section-title { font-size: clamp(28px, 3.6vw, 40px); font-weight: 800; letter-spacing: -0.02em; color: var(--color-primary); line-height: 1.22; margin-bottom: 16px; }
.section-desc { font-size: 16px; color: var(--color-text-2); }

/* ============ 产品卡（首页） ============ */
.product-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.product-card {
  position: relative; background: #fff; border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 40px; overflow: hidden;
  transition: all 0.35s ease; display: flex; flex-direction: column;
}
.product-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--gradient-main); opacity: 0; transition: opacity 0.35s;
}
.product-card:hover { transform: translateY(-7px); box-shadow: var(--shadow-lg); border-color: rgba(0, 102, 255, 0.28); }
.product-card:hover::before { opacity: 1; }
.product-card .top { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 22px; }
.product-card .icon-box { width: 58px; height: 58px; border-radius: 17px; }
.product-card .icon-box svg { width: 27px; height: 27px; }
.badge-star {
  display: inline-flex; align-items: center; gap: 5px; padding: 5px 12px; border-radius: 999px;
  background: linear-gradient(135deg, #FEF3C7, #FDE68A); color: #B45309;
  font-size: 12px; font-weight: 700;
}
.badge-star svg { width: 13px; height: 13px; }
.badge-ent { background: rgba(0,102,255,0.09); color: var(--color-primary-2); }
.product-card h3 { font-size: 24px; font-weight: 800; color: var(--color-primary); margin-bottom: 12px; letter-spacing: -0.01em; }
.product-card > p { font-size: 14.5px; color: var(--color-text-2); margin-bottom: 26px; }
.feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 13px 18px; margin-bottom: 30px; }
.feature-list li { display: flex; align-items: center; gap: 9px; font-size: 13.5px; color: var(--color-text); font-weight: 500; }
.feature-list li svg { width: 16px; height: 16px; color: var(--color-primary-2); flex-shrink: 0; }
.product-card .bottom { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.link-more { display: inline-flex; align-items: center; gap: 7px; font-size: 14.5px; font-weight: 700; color: var(--color-primary-2); }
.link-more svg { width: 16px; height: 16px; transition: transform 0.25s; }
.link-more:hover svg { transform: translateX(4px); }
.card-qr { display: flex; align-items: center; gap: 10px; padding: 8px 14px 8px 8px; border: 1px dashed rgba(0,102,255,0.35); border-radius: 12px; background: rgba(0,102,255,0.03); }
.card-qr img { width: 44px; height: 44px; border-radius: 7px; }
.card-qr .t { font-size: 11.5px; color: var(--color-text-2); line-height: 1.35; }
.card-qr .t strong { display: block; color: var(--color-primary-2); font-size: 12.5px; }

/* ============ 扫码体验专区 ============ */
.experience {
  position: relative; padding: 110px 0; overflow: hidden;
  background: var(--gradient-deep); color: #fff;
}
.experience::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.045) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(ellipse 75% 70% at 50% 50%, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 75% 70% at 50% 50%, black 30%, transparent 80%);
}
.exp-inner { position: relative; display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 80px; align-items: center; }
.exp-copy .eyebrow { color: var(--color-accent); }
.exp-copy .eyebrow::before { background: var(--color-accent); }
.exp-copy h2 { font-size: clamp(30px, 3.8vw, 42px); font-weight: 800; line-height: 1.2; letter-spacing: -0.02em; margin-bottom: 18px; }
.exp-copy > p { font-size: 16px; color: rgba(255,255,255,0.72); margin-bottom: 34px; max-width: 480px; }
.exp-points { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 26px; margin-bottom: 36px; }
.exp-points li { display: flex; align-items: center; gap: 12px; font-size: 14.5px; color: rgba(255,255,255,0.88); font-weight: 500; }
.exp-points li .icon-box { width: 40px; height: 40px; border-radius: 12px; }
.exp-points li .icon-box svg { width: 19px; height: 19px; }
.exp-stats { display: flex; gap: 40px; }
.exp-stats .s .n { font-size: 30px; font-weight: 800; color: var(--color-accent); letter-spacing: -0.02em; }
.exp-stats .s .l { font-size: 12.5px; color: rgba(255,255,255,0.6); margin-top: 3px; }

.exp-visual { display: flex; justify-content: center; position: relative; }
.qr-stage {
  position: relative; background: #fff; border-radius: 28px; padding: 30px 30px 26px;
  box-shadow: 0 40px 90px -20px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255,255,255,0.1);
  text-align: center; transform: rotate(1.5deg);
  transition: transform 0.4s ease;
}
.qr-stage:hover { transform: rotate(0deg) scale(1.02); }
.qr-stage .qr-frame {
  position: relative; border-radius: 18px; padding: 12px;
  background: linear-gradient(135deg, rgba(0,102,255,0.08), rgba(0,212,255,0.08));
  border: 1px solid var(--color-border);
}
.qr-stage .qr-frame img { width: 232px; height: 232px; border-radius: 10px; object-fit: cover; }
.qr-stage h4 { margin-top: 18px; font-size: 17px; font-weight: 800; color: var(--color-primary); }
.qr-stage p { margin-top: 5px; font-size: 12.5px; color: var(--color-text-3); }
.qr-stage .scan-line {
  position: absolute; left: 14px; right: 14px; height: 3px; border-radius: 3px;
  background: linear-gradient(90deg, transparent, var(--color-primary-2), transparent);
  opacity: 0.85; animation: scanMove 2.6s ease-in-out infinite;
}
@keyframes scanMove { 0%, 100% { top: 12%; } 50% { top: 84%; } }
.exp-orbit {
  position: absolute; width: 118px; height: 118px; border-radius: 50%;
  border: 1.5px dashed rgba(255,255,255,0.3); top: -34px; left: -34px;
  animation: spinSlow 18s linear infinite;
}
.exp-orbit::after { content: ""; position: absolute; width: 10px; height: 10px; border-radius: 50%; background: var(--color-accent); top: 6px; left: 50%; box-shadow: 0 0 14px var(--color-accent); }
@keyframes spinSlow { to { transform: rotate(360deg); } }

/* ============ 技术实力（首页） ============ */
.tech-grid { display: grid; grid-template-columns: 0.95fr 1.05fr; gap: 64px; align-items: center; }
.tech-points { display: flex; flex-direction: column; gap: 26px; margin-top: 34px; }
.tech-point { display: flex; gap: 18px; }
.tech-point h4 { font-size: 16.5px; font-weight: 700; color: var(--color-primary); margin-bottom: 5px; }
.tech-point p { font-size: 14px; color: var(--color-text-2); }

.llm-panel {
  position: relative; background: var(--color-bg-dark); border-radius: var(--radius-lg);
  padding: 42px; color: #fff; overflow: hidden; box-shadow: var(--shadow-lg);
}
.llm-panel::before {
  content: ""; position: absolute; top: -110px; right: -110px; width: 330px; height: 330px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.22), transparent 68%);
}
.llm-panel .panel-tag {
  display: inline-flex; align-items: center; gap: 7px; padding: 6px 14px; border-radius: 999px;
  background: rgba(0, 212, 255, 0.12); border: 1px solid rgba(0, 212, 255, 0.28);
  color: var(--color-accent); font-size: 12px; font-weight: 700; letter-spacing: 0.05em; margin-bottom: 20px;
}
.llm-panel .panel-tag svg { width: 14px; height: 14px; }
.llm-panel h3 { position: relative; font-size: 25px; font-weight: 800; margin-bottom: 12px; letter-spacing: -0.01em; }
.llm-panel > p { position: relative; font-size: 14px; color: rgba(255,255,255,0.62); margin-bottom: 30px; }
.llm-caps { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.llm-cap {
  background: rgba(255, 255, 255, 0.045); border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius-md); padding: 20px; transition: all 0.3s;
}
.llm-cap:hover { background: rgba(255, 255, 255, 0.09); border-color: rgba(0, 212, 255, 0.4); transform: translateY(-3px); }
.llm-cap .icon-box { width: 40px; height: 40px; border-radius: 11px; margin-bottom: 13px; }
.llm-cap .icon-box svg { width: 19px; height: 19px; }
.llm-cap h5 { font-size: 14.5px; font-weight: 700; margin-bottom: 5px; }
.llm-cap p { font-size: 12.5px; color: rgba(255, 255, 255, 0.55); line-height: 1.55; }

/* ============ 行业卡 ============ */
.industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.industry-card {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md);
  padding: 32px 26px; text-align: center; transition: all 0.3s ease;
}
.industry-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(0, 102, 255, 0.3); }
.industry-card .icon-box { margin: 0 auto 18px; width: 58px; height: 58px; border-radius: 17px; }
.industry-card .icon-box svg { width: 26px; height: 26px; }
.industry-card h4 { font-size: 17px; font-weight: 700; color: var(--color-primary); margin-bottom: 8px; }
.industry-card p { font-size: 13px; color: var(--color-text-3); }

/* ============ CTA ============ */
.cta { padding: 100px 0; }
.cta-inner {
  position: relative; background: var(--gradient-deep); border-radius: var(--radius-xl);
  padding: 80px 40px; text-align: center; overflow: hidden; box-shadow: var(--shadow-lg);
}
.cta-inner::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    radial-gradient(rgba(0, 212, 255, 0.3) 1px, transparent 1px);
  background-size: 26px 26px; opacity: 0.35;
  mask-image: radial-gradient(ellipse 75% 85% at 50% 100%, black, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 75% 85% at 50% 100%, black, transparent 78%);
}
.cta-inner h2 { position: relative; font-size: clamp(28px, 3.4vw, 40px); font-weight: 800; color: #fff; letter-spacing: -0.02em; margin-bottom: 16px; }
.cta-inner p { position: relative; font-size: 15.5px; color: rgba(255, 255, 255, 0.7); max-width: 560px; margin: 0 auto 36px; }
.cta-buttons { position: relative; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ============ 页脚 ============ */
.site-footer { background: #060D18; color: rgba(255, 255, 255, 0.62); padding: 76px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 48px; padding-bottom: 54px; }
.footer-brand .brand { color: #fff; margin-bottom: 18px; }
.footer-brand > p { font-size: 13.5px; line-height: 1.75; max-width: 300px; margin-bottom: 24px; }
.footer-qr { display: flex; align-items: center; gap: 13px; }
.footer-qr img { width: 66px; height: 66px; border-radius: 10px; border: 1px solid rgba(255,255,255,0.14); padding: 4px; background: #fff; }
.footer-qr .t { font-size: 12.5px; color: rgba(255,255,255,0.55); line-height: 1.55; }
.footer-qr .t strong { display: block; color: #fff; font-size: 13px; margin-bottom: 2px; }
.footer-col h5 { color: #fff; font-size: 14.5px; font-weight: 700; margin-bottom: 18px; }
.footer-col ul { display: flex; flex-direction: column; gap: 11px; }
.footer-col a { font-size: 13.5px; color: rgba(255, 255, 255, 0.55); transition: all 0.2s; display: inline-flex; align-items: center; gap: 6px; }
.footer-col a:hover { color: var(--color-accent); transform: translateX(3px); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08); padding: 24px 0;
  display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap;
  font-size: 12.5px; color: rgba(255, 255, 255, 0.38);
}

/* ============ 内页 Hero ============ */
.page-hero {
  position: relative; padding: 168px 0 96px; overflow: hidden;
  background:
    radial-gradient(820px 420px at 88% -12%, rgba(0, 212, 255, 0.12), transparent 62%),
    radial-gradient(720px 460px at 5% 112%, rgba(0, 102, 255, 0.08), transparent 62%),
    var(--color-bg-soft);
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(10, 37, 64, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 37, 64, 0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 85% 72% at 50% 35%, black 22%, transparent 76%);
  -webkit-mask-image: radial-gradient(ellipse 85% 72% at 50% 35%, black 22%, transparent 76%);
}
.page-hero .container { position: relative; }
.page-hero h1 { font-size: clamp(36px, 4.6vw, 54px); font-weight: 800; letter-spacing: -0.02em; color: var(--color-primary); line-height: 1.18; margin-bottom: 20px; }
.page-hero p { font-size: 17px; color: var(--color-text-2); max-width: 620px; }

/* ============ 关于我们页 ============ */
.about-story { padding: 100px 0; }
.about-story .grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.about-copy h2 { font-size: clamp(27px, 3.2vw, 37px); font-weight: 800; letter-spacing: -0.02em; color: var(--color-primary); margin-bottom: 20px; line-height: 1.25; }
.about-copy p { font-size: 15px; color: var(--color-text-2); margin-bottom: 16px; }
.about-copy .pill-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 26px; }
.about-copy .tag-pill {
  display: inline-flex; align-items: center; gap: 7px; padding: 8px 16px; border-radius: 999px;
  background: rgba(0, 102, 255, 0.06); border: 1px solid rgba(0, 102, 255, 0.16);
  font-size: 13px; font-weight: 600; color: var(--color-primary-2);
}
.about-copy .tag-pill svg { width: 14px; height: 14px; }
.about-visual { position: relative; }
.about-visual .panel {
  background: var(--gradient-deep); border-radius: var(--radius-lg); padding: 46px;
  color: #fff; box-shadow: var(--shadow-lg); position: relative; overflow: hidden;
}
.about-visual .panel::after {
  content: ""; position: absolute; bottom: -90px; right: -90px; width: 280px; height: 280px;
  border-radius: 50%; background: radial-gradient(circle, rgba(0, 212, 255, 0.3), transparent 70%);
}
.about-visual .panel .big { font-size: 50px; font-weight: 800; letter-spacing: -0.02em; line-height: 1; color: var(--color-accent); }
.about-visual .panel .sub { font-size: 15px; margin-top: 10px; color: rgba(255,255,255,0.75); }
.about-visual .panel .divider { height: 1px; background: rgba(255,255,255,0.12); margin: 30px 0; }
.about-visual .panel ul { position: relative; display: flex; flex-direction: column; gap: 15px; }
.about-visual .panel li { display: flex; align-items: center; gap: 11px; font-size: 14px; color: rgba(255,255,255,0.85); }
.about-visual .panel li svg { width: 17px; height: 17px; color: var(--color-accent); flex-shrink: 0; }

/* 价值观 */
.values-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.value-card {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md);
  padding: 34px 28px; transition: all 0.3s ease; position: relative; overflow: hidden;
}
.value-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(0, 102, 255, 0.3); }
.value-card .icon-box { margin-bottom: 20px; width: 54px; height: 54px; border-radius: 15px; }
.value-card .icon-box svg { width: 25px; height: 25px; }
.value-card h3 { font-size: 17.5px; font-weight: 700; color: var(--color-primary); margin-bottom: 10px; }
.value-card p { font-size: 13.5px; color: var(--color-text-2); }

/* 资质 */
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cert-card {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md);
  padding: 28px 24px; text-align: left; transition: all 0.3s ease; position: relative; overflow: hidden;
}
.cert-card::after {
  content: ""; position: absolute; top: 0; right: 0; width: 72px; height: 72px;
  background: radial-gradient(circle at top right, rgba(0, 212, 255, 0.12), transparent 70%);
}
.cert-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: rgba(0, 102, 255, 0.3); }
.cert-card .icon-box { width: 46px; height: 46px; border-radius: 13px; margin-bottom: 16px; }
.cert-card .icon-box svg { width: 21px; height: 21px; }
.cert-card h4 { font-size: 15px; font-weight: 700; color: var(--color-primary); margin-bottom: 7px; line-height: 1.4; }
.cert-card p { font-size: 12.5px; color: var(--color-text-3); display: flex; align-items: center; gap: 6px; }
.cert-card p svg { width: 13px; height: 13px; color: #059669; }
.cert-card.highlight {
  background: var(--gradient-deep); border: none; color: #fff;
  grid-column: span 2;
}
.cert-card.highlight h4 { color: #fff; font-size: 17px; }
.cert-card.highlight p { color: rgba(255,255,255,0.62); }
.cert-card.highlight p svg { color: var(--color-accent); }
.cert-card.highlight .icon-box { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.16); color: var(--color-accent); }

/* 时间线 */
.timeline { position: relative; max-width: 820px; margin: 0 auto; padding-left: 34px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 8px; bottom: 8px; width: 2px; background: linear-gradient(180deg, var(--color-primary-2), var(--color-accent)); border-radius: 2px; opacity: 0.35; }
.timeline-item { position: relative; padding-bottom: 40px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: ""; position: absolute; left: -31px; top: 7px; width: 12px; height: 12px;
  border-radius: 50%; background: #fff; border: 3.5px solid var(--color-primary-2);
  box-shadow: 0 0 0 5px rgba(0, 102, 255, 0.1);
}
.timeline-item .time { display: inline-block; font-size: 12px; font-weight: 700; color: var(--color-primary-2); background: rgba(0,102,255,0.07); border: 1px solid rgba(0,102,255,0.15); padding: 4px 13px; border-radius: 999px; margin-bottom: 11px; letter-spacing: 0.03em; }
.timeline-item h4 { font-size: 17px; font-weight: 700; color: var(--color-primary); margin-bottom: 8px; display: flex; align-items: center; gap: 9px; }
.timeline-item h4 svg { width: 17px; height: 17px; color: var(--color-primary-2); }
.timeline-item p { font-size: 14px; color: var(--color-text-2); max-width: 620px; }

/* ============ 产品页 ============ */
.product-detail { padding: 100px 0; }
.pd-grid { display: grid; grid-template-columns: 1.02fr 0.98fr; gap: 76px; align-items: center; }
.pd-grid.reverse .pd-content { order: 2; }
.pd-grid.reverse .pd-visual { order: 1; }
.product-tag {
  display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px; border-radius: 999px;
  font-size: 12px; font-weight: 700; letter-spacing: 0.04em; margin-bottom: 20px;
  background: rgba(0,102,255,0.08); color: var(--color-primary-2); border: 1px solid rgba(0,102,255,0.16);
}
.product-tag svg { width: 13px; height: 13px; }
.pd-content h2 { font-size: clamp(30px, 3.6vw, 42px); font-weight: 800; letter-spacing: -0.02em; color: var(--color-primary); margin-bottom: 18px; }
.pd-content > p { font-size: 15.5px; color: var(--color-text-2); margin-bottom: 34px; }
.pd-features { display: flex; flex-direction: column; gap: 20px; margin-bottom: 38px; }
.pd-features li { display: flex; gap: 15px; align-items: flex-start; }
.pd-features .icon-box { width: 44px; height: 44px; border-radius: 12px; }
.pd-features .icon-box svg { width: 20px; height: 20px; }
.pd-features .text strong { display: block; font-size: 15.5px; font-weight: 700; color: var(--color-primary); margin-bottom: 3px; }
.pd-features .text span { font-size: 13.5px; color: var(--color-text-2); }

.pd-visual { position: relative; }
.pd-mock {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); overflow: hidden;
}
.pd-mock-head { display: flex; gap: 8px; padding: 15px 20px; background: var(--color-bg-soft); border-bottom: 1px solid var(--color-border); }
.pd-mock-head span { width: 10px; height: 10px; border-radius: 50%; }
.pd-mock-head span:nth-child(1) { background: #FF5F57; }
.pd-mock-head span:nth-child(2) { background: #FEBC2E; }
.pd-mock-head span:nth-child(3) { background: #28C840; }
.pd-mock-row { display: flex; align-items: center; gap: 14px; padding: 16px 22px; border-bottom: 1px dashed var(--color-border); }
.pd-mock-row:last-of-type { border-bottom: none; }
.pd-mock-row .ico {
  width: 38px; height: 38px; border-radius: 10px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,102,255,0.08); color: var(--color-primary-2);
}
.pd-mock-row .ico svg { width: 18px; height: 18px; }
.pd-mock-row .bar { flex: 1; height: 9px; border-radius: 6px; background: var(--color-bg-soft); overflow: hidden; }
.pd-mock-row .bar i { display: block; height: 100%; border-radius: 6px; background: var(--gradient-main); }
.pd-mock-row .val { font-size: 12.5px; font-weight: 700; color: var(--color-text-2); min-width: 46px; text-align: right; }
.pd-mock-cta {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 16px; background: var(--color-primary); color: #fff; font-size: 14px; font-weight: 600;
}
.pd-mock-cta svg { width: 15px; height: 15px; }
.pd-decor {
  position: absolute; padding: 11px 17px; background: #fff; border-radius: 13px;
  box-shadow: var(--shadow-md); font-size: 13px; font-weight: 700; color: var(--color-primary);
  display: flex; align-items: center; gap: 9px; border: 1px solid var(--color-border);
  animation: floatY 5.5s ease-in-out infinite;
}
.pd-decor svg { width: 17px; height: 17px; }
.pd-decor.t1 { top: -20px; right: 14px; color: var(--color-primary-2); }
.pd-decor.t2 { bottom: -18px; left: -16px; color: #059669; animation-delay: 1.6s; }

/* 产品页二维码卡 */
.pd-qr-card {
  position: absolute; bottom: -30px; right: -22px; background: #fff;
  border: 1px solid var(--color-border); border-radius: 18px; box-shadow: var(--shadow-lg);
  padding: 16px; display: flex; align-items: center; gap: 14px;
  animation: floatY 6s ease-in-out infinite; animation-delay: 0.8s;
}
.pd-qr-card img { width: 88px; height: 88px; border-radius: 10px; }
.pd-qr-card .t strong { display: block; font-size: 14px; color: var(--color-primary); margin-bottom: 4px; }
.pd-qr-card .t span { font-size: 12px; color: var(--color-text-3); line-height: 1.5; display: block; }
.pd-qr-card .t .mini-btn {
  display: inline-flex; align-items: center; gap: 5px; margin-top: 8px;
  font-size: 11.5px; font-weight: 700; color: var(--color-primary-2);
}
.pd-qr-card .t .mini-btn svg { width: 12px; height: 12px; }

/* 大模型区块（产品页） */
.llm-section { padding: 100px 0; background: var(--color-bg-dark); color: #fff; position: relative; overflow: hidden; }
.llm-section::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(0,212,255,0.13) 1px, transparent 1px);
  background-size: 30px 30px; opacity: 0.5;
  mask-image: radial-gradient(ellipse 70% 80% at 80% 20%, black, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 80% 20%, black, transparent 75%);
}
.llm-inner { position: relative; text-align: center; max-width: 900px; margin: 0 auto; }
.llm-inner .eyebrow { color: var(--color-accent); justify-content: center; }
.llm-inner .eyebrow::before { background: var(--color-accent); }
.llm-inner h2 { font-size: clamp(28px, 3.6vw, 40px); font-weight: 800; letter-spacing: -0.02em; margin-bottom: 16px; }
.llm-inner > p { font-size: 15.5px; color: rgba(255,255,255,0.62); max-width: 640px; margin: 0 auto 52px; }
.llm-caps.big { grid-template-columns: repeat(4, 1fr); gap: 18px; }
.llm-caps.big .llm-cap { padding: 28px 22px; }
.llm-caps.big .llm-cap .icon-box { margin: 0 auto 16px; width: 50px; height: 50px; border-radius: 14px; }
.llm-caps.big .llm-cap .icon-box svg { width: 23px; height: 23px; }
.llm-caps.big .llm-cap h4 { font-size: 15.5px; font-weight: 700; margin-bottom: 8px; }
.llm-caps.big .llm-cap p { font-size: 13px; color: rgba(255,255,255,0.55); }

/* 服务流程 */
.flow-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: flow; }
.flow-card {
  position: relative; background: #fff; border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 36px 26px 30px; transition: all 0.3s;
}
.flow-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(0,102,255,0.3); }
.flow-card .step-no {
  position: absolute; top: 22px; right: 24px; font-size: 40px; font-weight: 800;
  color: transparent; -webkit-text-stroke: 1.5px rgba(0, 102, 255, 0.22); line-height: 1;
}
.flow-card .icon-box { margin-bottom: 20px; width: 52px; height: 52px; border-radius: 15px; }
.flow-card .icon-box svg { width: 24px; height: 24px; }
.flow-card h3 { font-size: 16.5px; font-weight: 700; color: var(--color-primary); margin-bottom: 9px; }
.flow-card p { font-size: 13.5px; color: var(--color-text-2); }

/* ============ 联系页 ============ */
.contact-section { padding: 100px 0; }
.contact-grid { display: grid; grid-template-columns: 0.92fr 1.08fr; gap: 32px; align-items: start; }

.contact-info {
  background: var(--gradient-deep); border-radius: var(--radius-lg); padding: 46px;
  color: #fff; position: relative; overflow: hidden; height: 100%;
}
.contact-info::after {
  content: ""; position: absolute; bottom: -100px; right: -100px; width: 300px; height: 300px;
  border-radius: 50%; background: radial-gradient(circle, rgba(0, 212, 255, 0.25), transparent 70%);
}
.contact-info h3 { font-size: 26px; font-weight: 800; margin-bottom: 12px; letter-spacing: -0.01em; }
.contact-info > p { font-size: 14px; color: rgba(255, 255, 255, 0.68); margin-bottom: 36px; }
.contact-list { position: relative; display: flex; flex-direction: column; gap: 26px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-item .icon-box { width: 46px; height: 46px; border-radius: 13px; }
.contact-item .icon-box svg { width: 21px; height: 21px; }
.contact-item .label { font-size: 12px; color: rgba(255,255,255,0.5); margin-bottom: 4px; letter-spacing: 0.03em; }
.contact-item .val { font-size: 15px; font-weight: 600; color: #fff; }

.contact-form {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 46px; box-shadow: var(--shadow-md);
}
.contact-form h3 { font-size: 22px; font-weight: 800; color: var(--color-primary); margin-bottom: 8px; }
.contact-form .hint { font-size: 13.5px; color: var(--color-text-3); margin-bottom: 30px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { margin-bottom: 18px; }
.form-field label { display: block; font-size: 13.5px; font-weight: 600; color: var(--color-primary); margin-bottom: 8px; }
.form-field input, .form-field select, .form-field textarea {
  width: 100%; padding: 13px 16px; border: 1.5px solid var(--color-border); border-radius: var(--radius-sm);
  font-size: 14.5px; font-family: inherit; color: var(--color-text); background: var(--color-bg-soft);
  transition: all 0.25s; outline: none;
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  border-color: var(--color-primary-2); background: #fff; box-shadow: 0 0 0 4px rgba(0, 102, 255, 0.09);
}
.form-field textarea { resize: vertical; min-height: 108px; }
.form-submit {
  width: 100%; padding: 15px; border: none; border-radius: 999px;
  background: var(--gradient-main); color: #fff; font-size: 15.5px; font-weight: 700;
  cursor: pointer; box-shadow: var(--shadow-blue); transition: all 0.25s; font-family: inherit;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
}
.form-submit svg { width: 16px; height: 16px; }
.form-submit:hover { transform: translateY(-2px); box-shadow: 0 20px 44px -10px rgba(0, 102, 255, 0.55); }

/* 联系页双二维码 */
.qr-dual { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 22px; }
.qr-card {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 28px 24px; text-align: center; box-shadow: var(--shadow-sm); transition: all 0.3s;
  position: relative; overflow: hidden;
}
.qr-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--gradient-main);
}
.qr-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.qr-card .qr-frame {
  display: inline-block; padding: 10px; border-radius: 16px; position: relative;
  background: linear-gradient(135deg, rgba(0,102,255,0.06), rgba(0,212,255,0.06));
  border: 1px solid var(--color-border); margin-bottom: 16px;
}
.qr-card img { width: 168px; height: 168px; border-radius: 9px; object-fit: cover; }
.qr-card .qr-label {
  display: inline-flex; align-items: center; gap: 6px; font-size: 11px; font-weight: 700;
  padding: 4px 11px; border-radius: 999px; margin-bottom: 10px;
  background: rgba(7,193,96,0.10); color: #059669; border: 1px solid rgba(7,193,96,0.2);
}
.qr-card .qr-label.blue { background: rgba(0,102,255,0.08); color: var(--color-primary-2); border-color: rgba(0,102,255,0.18); }
.qr-card .qr-label svg { width: 12px; height: 12px; }
.qr-card h4 { font-size: 16.5px; font-weight: 800; color: var(--color-primary); margin-bottom: 6px; }
.qr-card p { font-size: 12.5px; color: var(--color-text-3); line-height: 1.6; }

/* FAQ */
.faq { padding: 100px 0; background: var(--color-bg-soft); }
.faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-md);
  overflow: hidden; transition: all 0.3s;
}
.faq-item:hover { border-color: rgba(0,102,255,0.3); }
.faq-item summary {
  list-style: none; cursor: pointer; padding: 21px 26px; font-size: 15.5px; font-weight: 600;
  color: var(--color-primary); display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .faq-icon {
  width: 28px; height: 28px; border-radius: 8px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,102,255,0.07); color: var(--color-primary-2);
  transition: all 0.3s;
}
.faq-item summary .faq-icon svg { width: 15px; height: 15px; transition: transform 0.3s; }
.faq-item[open] { box-shadow: var(--shadow-md); border-color: rgba(0,102,255,0.3); }
.faq-item[open] summary .faq-icon { background: var(--gradient-main); color: #fff; }
.faq-item[open] summary .faq-icon svg { transform: rotate(45deg); }
.faq-item p { padding: 0 26px 22px; font-size: 14px; color: var(--color-text-2); line-height: 1.75; }

/* ============ 滚动渐显 ============ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal:nth-child(2) { transition-delay: 0.08s; }
.reveal:nth-child(3) { transition-delay: 0.16s; }
.reveal:nth-child(4) { transition-delay: 0.24s; }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .hero-inner, .tech-grid, .exp-inner { grid-template-columns: 1fr; gap: 56px; }
  .hero-visual { max-width: 560px; }
  .chip-2 { left: -8px; }
  .chip-qr { right: -6px; }
  .industry-grid, .values-grid, .cert-grid, .llm-caps.big, .flow-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .stats-band .band { grid-template-columns: repeat(2, 1fr); padding: 40px; }
  .cert-card.highlight { grid-column: span 2; }
  .pd-grid, .pd-grid.reverse { grid-template-columns: 1fr; gap: 80px; }
  .pd-grid.reverse .pd-content { order: 1; }
  .pd-grid.reverse .pd-visual { order: 2; }
  .contact-grid { grid-template-columns: 1fr; }
  .about-story .grid { grid-template-columns: 1fr; gap: 48px; }
  .pd-qr-card { right: 0; bottom: -40px; }
}

@media (max-width: 640px) {
  .section { padding: 72px 0; }
  .hero { padding: 148px 0 80px; }
  .nav-menu {
    position: fixed; top: 72px; left: 16px; right: 16px;
    flex-direction: column; align-items: stretch; background: #fff;
    border: 1px solid var(--color-border); border-radius: var(--radius-md);
    padding: 12px; box-shadow: var(--shadow-lg);
    opacity: 0; visibility: hidden; transform: translateY(-10px); transition: all 0.3s;
  }
  .nav-menu.open { opacity: 1; visibility: visible; transform: translateY(0); }
  .nav-link { display: block; padding: 13px 16px; }
  .nav-link.active::after { display: none; }
  .nav-cta { margin: 8px 4px 4px; text-align: center; justify-content: center; }
  .nav-toggle { display: flex; }
  .product-grid, .industry-grid, .values-grid, .cert-grid, .llm-caps, .llm-caps.big,
  .feature-list, .stats-band .band, .form-row, .footer-grid, .flow-grid, .qr-dual,
  .exp-points { grid-template-columns: 1fr; }
  .cert-card.highlight { grid-column: span 1; }
  .product-card { padding: 30px 24px; }
  .contact-form, .contact-info { padding: 32px 26px; }
  .cta-inner { padding: 60px 26px; }
  .stats-band .band { padding: 34px 28px; }
  .stat-item .num { font-size: 34px; }
  .chip-2 { display: none; }
  .chip-qr { bottom: -30px; right: 6px; }
  .exp-stats { gap: 26px; }
  .qr-stage .qr-frame img { width: 200px; height: 200px; }
  .pd-qr-card { position: relative; bottom: auto; right: auto; margin-top: 22px; animation: none; }
  .hero-trust { flex-wrap: wrap; }
}