/* =========================================
   Wanshi Ads - Global Stylesheet
   Design tokens + Components
   ========================================= */

/* --- Design Tokens --- */
:root {
  /* Brand */
  --primary-deep: #0B1D3A;
  --primary-mid: #1A3A6A;
  --primary-bright: #2B4F8F;
  --primary-soft: #3D6BAA;

  --gold-deep: #A07A28;
  --gold: #C49A4A;
  --gold-light: #D9B36A;

  --orange: #E07A3F;
  --green: #16A34A;
  --red: #DC2626;

  /* Neutrals */
  --ink-900: #0F172A;
  --ink-700: #1F2937;
  --ink-500: #4B5563;
  --ink-400: #6B7280;
  --ink-300: #9CA3AF;
  --ink-200: #D1D5DB;
  --ink-100: #E5E7EB;
  --ink-50:  #F3F4F6;

  --warm-bg: #F8F5F0;
  --soft-bg: #FAFBFC;
  --pure-white: #FFFFFF;

  /* Surfaces */
  --surface-card: #FFFFFF;
  --surface-elev: #FFFFFF;
  --border-soft: rgba(15, 23, 42, 0.08);
  --border-mid: rgba(15, 23, 42, 0.12);

  /* Gradients */
  --grad-deep: linear-gradient(135deg, #0B1D3A 0%, #1A3A6A 60%, #2B4F8F 100%);
  --grad-vibrant: linear-gradient(135deg, #1A3A6A 0%, #2B4F8F 100%);
  --grad-gold: linear-gradient(135deg, #C49A4A 0%, #E0BE74 100%);
  --grad-warm: linear-gradient(180deg, #FAF7F1 0%, #FFFFFF 100%);

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(15,23,42,0.04);
  --shadow-sm: 0 2px 8px rgba(15,23,42,0.06);
  --shadow-md: 0 8px 24px rgba(15,23,42,0.08);
  --shadow-lg: 0 16px 40px rgba(15,23,42,0.12);
  --shadow-xl: 0 24px 60px rgba(15,23,42,0.18);
  --shadow-gold: 0 8px 28px rgba(196,154,74,0.32);
  --shadow-blue: 0 8px 28px rgba(43,79,143,0.32);
  --shadow-inset: inset 0 1px 0 rgba(255,255,255,0.06);

  /* Radius */
  --r-xs: 4px;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-full: 999px;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-32: 128px;

  /* Type */
  --font-cn: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-en: "Inter", system-ui, -apple-system, "Helvetica Neue", sans-serif;
  --font-num: "Inter", "DIN Alternate", "DIN", system-ui, sans-serif;

  /* Motion */
  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --container-max: 1240px;
  --nav-h: 72px;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; padding: 0; }
img, svg, video { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; border: none; background: none; padding: 0; color: inherit; }
a { color: inherit; text-decoration: none; transition: color .2s var(--ease-out); }
ul, ol { list-style: none; padding: 0; margin: 0; }
input, textarea, select { font: inherit; }

/* --- Base --- */
html, body {
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-700);
  background: var(--pure-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--gold); color: var(--primary-deep); }

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

p { margin: 0; }

/* --- Layout helpers --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(11, 29, 58, 0.0);
  backdrop-filter: blur(0);
  transition: all .35s var(--ease-out);
}
.nav.is-scrolled {
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(15,23,42,0.06), 0 8px 28px rgba(15,23,42,0.06);
}
.nav.is-scrolled .nav__logo-mark,
.nav.is-scrolled .nav__link { color: var(--ink-900); }
.nav.is-scrolled .nav__link.is-active { color: var(--primary-mid); }
.nav.is-scrolled .nav__cta { background: var(--grad-vibrant); color: #fff; }

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.nav__brand { display: flex; align-items: center; gap: 10px; }
.nav__logo-mark {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: var(--grad-gold);
  display: grid; place-items: center;
  color: var(--primary-deep);
  font-family: var(--font-en);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: -0.02em;
  box-shadow: var(--shadow-gold);
}
.nav__logo-text {
  font-family: var(--font-cn);
  font-weight: 800;
  font-size: 18px;
  color: #fff;
  letter-spacing: 0.04em;
}
.nav__logo-text small {
  display: block;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.18em;
  opacity: 0.7;
  margin-top: 2px;
}

.nav__links {
  display: flex;
  gap: 36px;
  align-items: center;
}
.nav__link {
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  position: relative;
  padding: 6px 0;
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  height: 2px;
  width: 0;
  background: var(--gold);
  transition: width .25s var(--ease-out);
}
.nav__link:hover::after,
.nav__link.is-active::after { width: 100%; }
.nav__link.is-active { color: var(--gold-light); }

.nav__cta {
  padding: 10px 22px;
  border-radius: var(--r-full);
  background: rgba(255,255,255,0.12);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.25);
  transition: all .25s var(--ease-out);
}
.nav__cta:hover {
  background: var(--grad-gold);
  border-color: transparent;
  color: var(--primary-deep);
  transform: translateY(-1px);
  box-shadow: var(--shadow-gold);
}

.nav__burger { display: none; }

@media (max-width: 880px) {
  .nav__links { display: none; }
  .nav__cta { padding: 8px 16px; font-size: 13px; }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--r-full);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all .25s var(--ease-out);
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--grad-gold);
  color: var(--primary-deep);
  box-shadow: var(--shadow-gold);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(196,154,74,0.42);
}
.btn--blue {
  background: var(--grad-vibrant);
  color: #fff;
  box-shadow: var(--shadow-blue);
}
.btn--blue:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(43,79,143,0.42);
}
.btn--ghost {
  background: rgba(255,255,255,0.06);
  color: inherit;
  border-color: rgba(255,255,255,0.25);
}
.btn--ghost:hover {
  background: rgba(255,255,255,0.14);
  border-color: rgba(255,255,255,0.4);
}
.btn--outline {
  background: transparent;
  color: var(--primary-mid);
  border-color: var(--primary-mid);
}
.btn--outline:hover {
  background: var(--primary-mid);
  color: #fff;
}
.btn--lg { padding: 18px 36px; font-size: 16px; }

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  padding: calc(var(--nav-h) + 60px) 0 120px;
  background: var(--grad-deep);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
.hero::before, .hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  z-index: -1;
  opacity: 0.5;
}
.hero::before {
  width: 540px; height: 540px;
  background: radial-gradient(circle, rgba(196,154,74,0.55), transparent 70%);
  top: -120px; right: -120px;
}
.hero::after {
  width: 720px; height: 720px;
  background: radial-gradient(circle, rgba(43,79,143,0.7), transparent 70%);
  bottom: -200px; left: -160px;
}
.hero__grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 50% 30%, #000 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 30%, transparent 70%);
  z-index: -1;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
  gap: 60px;
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--r-full);
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.18);
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold-light);
  margin-bottom: 24px;
}
.hero__eyebrow::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(196,154,74,0.25);
  animation: pulse 2.4s infinite ease-in-out;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}
.hero__title {
  font-size: clamp(36px, 5.2vw, 60px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 24px;
}
.hero__title b {
  background: linear-gradient(180deg, #E5C57E 0%, #C49A4A 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__sub {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255,255,255,0.78);
  max-width: 540px;
  margin-bottom: 36px;
}
.hero__cta-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}
.hero__stat {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  padding-top: 36px;
  border-top: 1px solid rgba(255,255,255,0.14);
}
.hero__stat-item .num {
  font-family: var(--font-num);
  font-size: 36px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  display: block;
  margin-bottom: 4px;
}
.hero__stat-item .num small {
  font-size: 18px;
  color: var(--gold-light);
  margin-left: 2px;
}
.hero__stat-item .label {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.1em;
}

/* Hero card right side */
.hero__visual {
  position: relative;
  width: 100%;
  aspect-ratio: 4/5;
  max-width: 460px;
  margin-left: auto;
}
.hero-card {
  position: absolute;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--r-lg);
  padding: 18px 20px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-lg);
}
.hero-card--main {
  inset: 0;
  background: rgba(255,255,255,0.08);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.hero-card--main .row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: rgba(255,255,255,0.05);
  border-radius: var(--r-md);
  border: 1px solid rgba(255,255,255,0.08);
}
.hero-card__title {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.platform-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 500;
}
.platform-chip .dot {
  width: 32px; height: 32px;
  border-radius: 8px;
  display: grid; place-items: center;
  font-size: 14px;
  font-weight: 800;
  color: #fff;
}
.platform-chip .dot.jl { background: #000; }
.platform-chip .dot.gdt { background: #07C160; }
.platform-chip .dot.ks { background: #FF6633; }
.platform-chip .dot.xhs { background: #FF2442; }
.platform-chip .dot.bd { background: #2932E1; }
.platform-chip .dot.chy { background: #5F2DEE; }
.platform-chip .name { color: #fff; font-weight: 600; }
.platform-chip .tag { font-size: 12px; color: rgba(255,255,255,0.6); }

.hero-card--small {
  padding: 16px 18px;
  border-radius: var(--r-lg);
  width: 220px;
}
.hero-card--a { left: -40px; top: 60px; }
.hero-card--b { right: -40px; bottom: 80px; }

.kpi-mini {
  font-family: var(--font-num);
  font-size: 28px;
  font-weight: 800;
  color: var(--gold-light);
  line-height: 1;
}
.kpi-mini small {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  margin-left: 4px;
}
.kpi-mini-label {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
  margin-top: 6px;
  letter-spacing: 0.06em;
}

@media (max-width: 980px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__visual { max-width: 420px; margin: 20px auto 0; }
  .hero { min-height: auto; padding-bottom: 80px; }
}
@media (max-width: 600px) {
  .hero__stat { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .hero__stat-item .num { font-size: 26px; }
}

/* --- Section header --- */
.section { padding: 120px 0; position: relative; }
.section--warm { background: var(--warm-bg); }
.section--soft { background: var(--soft-bg); }
.section--dark { background: var(--grad-deep); color: #fff; }
.section--dark h2, .section--dark h3 { color: #fff; }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 64px; }
.section-head__eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 16px;
  font-weight: 600;
}
.section-head--light .section-head__eyebrow { color: var(--gold-light); }
.section-head__title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.section-head__desc {
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-500);
}
.section--dark .section-head__desc { color: rgba(255,255,255,0.72); }

/* --- Service cards --- */
.services {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.service-card {
  background: #fff;
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  padding: 36px;
  transition: all .35s var(--ease-out);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 4px; height: 0;
  background: var(--grad-gold);
  transition: height .35s var(--ease-out);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.service-card:hover::before { height: 100%; }

.service-card__icon {
  width: 56px; height: 56px;
  border-radius: var(--r-md);
  background: linear-gradient(135deg, rgba(196,154,74,0.12), rgba(196,154,74,0.04));
  display: grid; place-items: center;
  margin-bottom: 24px;
  color: var(--gold);
  font-size: 26px;
}
.service-card__title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}
.service-card__desc {
  font-size: 15px;
  color: var(--ink-500);
  line-height: 1.7;
  margin-bottom: 20px;
}
.service-card__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.service-card__list li {
  font-size: 13px;
  color: var(--ink-700);
  padding: 4px 10px;
  background: var(--ink-50);
  border-radius: var(--r-xs);
}

@media (max-width: 720px) {
  .services { grid-template-columns: 1fr; }
  .service-card { padding: 28px 24px; }
}

/* --- Platforms section --- */
.platforms {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.platform-card {
  position: relative;
  padding: 32px;
  border-radius: var(--r-lg);
  background: #fff;
  border: 1px solid var(--border-soft);
  transition: all .35s var(--ease-out);
  overflow: hidden;
}
.platform-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.platform-card__top {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}
.platform-card__icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: grid; place-items: center;
  color: #fff;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.02em;
  font-family: var(--font-en);
}
.platform-card__name {
  font-size: 18px;
  font-weight: 700;
}
.platform-card__sub {
  font-size: 12px;
  color: var(--ink-400);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 2px;
}
.platform-card__desc {
  font-size: 14px;
  color: var(--ink-500);
  line-height: 1.7;
  margin-bottom: 20px;
}
.platform-card__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px dashed var(--border-soft);
}
.platform-card__stat .v {
  font-family: var(--font-num);
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-mid);
}
.platform-card__stat .l {
  font-size: 11px;
  color: var(--ink-400);
  margin-top: 2px;
}

.platform-card.jl .platform-card__icon { background: linear-gradient(135deg, #161823, #3D3D5C); }
.platform-card.gdt .platform-card__icon { background: linear-gradient(135deg, #07C160, #10B981); }
.platform-card.ks .platform-card__icon { background: linear-gradient(135deg, #FF6633, #FF8A4C); }

@media (max-width: 880px) { .platforms { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .platforms { grid-template-columns: 1fr; } }

/* --- Process / steps --- */
.process {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
  position: relative;
}
.process::before {
  content: "";
  position: absolute;
  left: 5%;
  right: 5%;
  top: 36px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--gold-light), var(--gold));
  z-index: 0;
  opacity: 0.4;
}
.step {
  text-align: center;
  position: relative;
  z-index: 1;
}
.step__num {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--gold);
  display: grid;
  place-items: center;
  margin: 0 auto 18px;
  font-family: var(--font-num);
  font-size: 28px;
  font-weight: 800;
  color: var(--gold-deep);
  position: relative;
  box-shadow: 0 0 0 8px rgba(196,154,74,0.08);
}
.step__num::after {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 50%;
  background: var(--grad-gold);
  opacity: 0.08;
}
.step__title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}
.step__desc {
  font-size: 13px;
  color: var(--ink-500);
  line-height: 1.6;
}

@media (max-width: 880px) {
  .process { grid-template-columns: repeat(3, 1fr); gap: 32px 12px; }
  .process::before { display: none; }
}
@media (max-width: 560px) { .process { grid-template-columns: repeat(2, 1fr); } }

/* --- Cases / industry --- */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case-card {
  background: #fff;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--border-soft);
  transition: all .35s var(--ease-out);
}
.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.case-card__visual {
  position: relative;
  aspect-ratio: 16/10;
  background: var(--grad-deep);
  display: grid;
  place-items: center;
  color: #fff;
  overflow: hidden;
}
.case-card__visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(196,154,74,0.35), transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(43,79,143,0.5), transparent 50%);
}
.case-card__industry {
  position: relative;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-light);
}
.case-card__body { padding: 24px; }
.case-card__title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.case-card__desc {
  font-size: 13px;
  color: var(--ink-500);
  line-height: 1.7;
  margin-bottom: 16px;
}
.case-card__metric {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-top: 16px;
  border-top: 1px solid var(--border-soft);
}
.case-card__metric .v {
  font-family: var(--font-num);
  font-size: 24px;
  font-weight: 800;
  color: var(--gold-deep);
}
.case-card__metric .l {
  font-size: 12px;
  color: var(--ink-400);
}

@media (max-width: 880px) { .cases-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .cases-grid { grid-template-columns: 1fr; } }

/* --- Why us / features --- */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature {
  padding: 32px;
  border-radius: var(--r-lg);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  backdrop-filter: blur(8px);
  transition: all .35s var(--ease-out);
}
.feature:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(196,154,74,0.4);
  transform: translateY(-4px);
}
.feature__icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: var(--grad-gold);
  display: grid;
  place-items: center;
  color: var(--primary-deep);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 18px;
}
.feature__title {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.feature__desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.7);
}
@media (max-width: 880px) { .features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .features { grid-template-columns: 1fr; } }

/* --- Data strip --- */
.data-strip {
  background: var(--grad-deep);
  color: #fff;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.data-strip::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.4;
}
.data-strip__row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
  z-index: 1;
}
.data-cell {
  text-align: center;
  padding: 12px;
}
.data-cell__num {
  font-family: var(--font-num);
  font-size: 56px;
  font-weight: 900;
  letter-spacing: -0.03em;
  background: linear-gradient(180deg, #fff, #D9B36A);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 12px;
}
.data-cell__num small {
  font-size: 24px;
  margin-left: 2px;
  -webkit-text-fill-color: var(--gold-light);
}
.data-cell__label {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  letter-spacing: 0.06em;
}
@media (max-width: 880px) {
  .data-strip__row { grid-template-columns: repeat(2, 1fr); }
  .data-cell__num { font-size: 42px; }
}

/* --- CTA banner --- */
.cta-banner {
  position: relative;
  background: var(--grad-deep);
  color: #fff;
  border-radius: var(--r-xl);
  padding: 64px 56px;
  overflow: hidden;
  margin: 0 24px;
}
.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 0% 50%, rgba(196,154,74,0.4), transparent 50%),
    radial-gradient(circle at 100% 50%, rgba(43,79,143,0.5), transparent 50%);
}
.cta-banner__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-banner__title {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  margin-bottom: 8px;
  color: #fff;
}
.cta-banner__desc {
  font-size: 15px;
  color: rgba(255,255,255,0.75);
  max-width: 540px;
}
.cta-banner__btns {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
@media (max-width: 720px) {
  .cta-banner { padding: 40px 28px; }
}

/* --- Footer --- */
.footer {
  background: var(--primary-deep);
  color: rgba(255,255,255,0.7);
  padding: 80px 0 32px;
}
.footer__top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 56px;
}
.footer__brand h4 {
  color: #fff;
  font-size: 22px;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}
.footer__brand p {
  font-size: 14px;
  line-height: 1.7;
  max-width: 320px;
  color: rgba(255,255,255,0.6);
}
.footer__col h5 {
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.footer__col li { margin-bottom: 10px; font-size: 14px; }
.footer__col a:hover { color: var(--gold-light); }
.footer__contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 14px;
}
.footer__contact-item .ic {
  color: var(--gold-light);
  margin-top: 2px;
  flex-shrink: 0;
}
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}
.footer__icp a:hover { color: var(--gold-light); }

@media (max-width: 880px) {
  .footer__top { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 560px) {
  .footer__top { grid-template-columns: 1fr; }
}

/* --- About page --- */
.about-hero {
  position: relative;
  background: var(--grad-deep);
  color: #fff;
  padding: calc(var(--nav-h) + 80px) 0 100px;
  overflow: hidden;
}
.about-hero__title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900;
  color: #fff;
  margin-bottom: 24px;
  max-width: 720px;
}
.about-hero__desc {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255,255,255,0.78);
  max-width: 640px;
}

.about-info {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: -56px;
  position: relative;
  z-index: 2;
}
.info-card {
  background: #fff;
  padding: 28px;
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-soft);
}
.info-card .label {
  font-size: 12px;
  color: var(--ink-400);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.info-card .value {
  font-family: var(--font-cn);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-900);
}

.timeline {
  max-width: 820px;
  margin: 0 auto;
  position: relative;
  padding-left: 32px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--border-mid);
}
.timeline-item {
  position: relative;
  padding: 0 0 32px 32px;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -32px; top: 6px;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--grad-gold);
  border: 4px solid #fff;
  box-shadow: 0 0 0 2px var(--gold-light);
}
.timeline-year {
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 700;
  color: var(--gold-deep);
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}
.timeline-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
}
.timeline-desc {
  font-size: 14px;
  color: var(--ink-500);
  line-height: 1.7;
}

.contact-info {
  background: var(--grad-deep);
  color: #fff;
  border-radius: var(--r-lg);
  padding: 36px;
  position: relative;
  overflow: hidden;
}
.contact-info::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(196,154,74,0.3), transparent 50%);
}
.contact-info__inner { position: relative; }
.contact-info h3 { color: #fff; font-size: 22px; margin-bottom: 12px; }
.contact-info__desc { color: rgba(255,255,255,0.7); font-size: 14px; line-height: 1.7; margin-bottom: 24px; }
.contact-info__item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.contact-info__item:last-child { border-bottom: none; }
.contact-info__item .ic {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: rgba(196,154,74,0.18);
  display: grid; place-items: center;
  color: var(--gold-light);
  flex-shrink: 0;
}
.contact-info__item .v { font-size: 15px; color: #fff; }
.contact-info__item .l { font-size: 12px; color: rgba(255,255,255,0.55); margin-top: 2px; }

/* --- Simplified contact (no form) --- */
.contact-simple { max-width: 660px; margin: 0 auto; text-align: center; }
.contact-cta {
  font-size: 18px;
  padding: 16px 44px;
  margin-bottom: 36px;
  box-shadow: 0 14px 34px rgba(196,154,74,0.32);
}
.contact-simple .contact-info { text-align: left; }

@media (max-width: 880px) {
  .about-info { grid-template-columns: repeat(2, 1fr); }
}

/* --- Page hero (smaller for inner pages) --- */
.page-hero {
  position: relative;
  background: var(--grad-deep);
  color: #fff;
  padding: calc(var(--nav-h) + 60px) 0 80px;
  overflow: hidden;
  isolation: isolate;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(196,154,74,0.32), transparent 50%);
  z-index: -1;
}
.page-hero__eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-light);
  margin-bottom: 16px;
  font-weight: 600;
}
.page-hero__title {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 900;
  color: #fff;
  margin-bottom: 18px;
  max-width: 800px;
  letter-spacing: -0.02em;
}
.page-hero__desc {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255,255,255,0.78);
  max-width: 680px;
}

/* --- Section padding override --- */
.section { padding: 100px 0; }
@media (max-width: 720px) { .section { padding: 72px 0; } }

/* --- Reveal animation (driven by JS) --- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s var(--ease-out), transform .7s var(--ease-out);
}
.reveal.is-in { opacity: 1; transform: none; }

/* --- Visually hidden --- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* =========================================
   WeCom KF (企微在线客服) — FAB + Modal
   ========================================= */

/* --- Floating action button --- */
.kf-fab {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 90;
  width: 60px; height: 60px;
  border-radius: 50%;
  background: var(--grad-gold);
  color: var(--primary-deep);
  display: grid;
  place-items: center;
  font-size: 26px;
  box-shadow: var(--shadow-gold);
  border: 3px solid rgba(255,255,255,0.35);
  transition: transform .25s var(--ease-out), box-shadow .25s var(--ease-out);
  animation: kf-fab-in .5s var(--ease-out) both;
  animation-delay: 1s;
}
@keyframes kf-fab-in {
  from { opacity: 0; transform: translateY(20px) scale(0.8); }
  to { opacity: 1; transform: none; }
}
.kf-fab:hover {
  transform: translateY(-3px) scale(1.06);
  box-shadow: 0 14px 36px rgba(196,154,74,0.5);
}
.kf-fab__ring {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 2px solid var(--gold);
  opacity: 0;
  animation: kf-ring 2.6s infinite ease-out;
  animation-delay: 2s;
  pointer-events: none;
}
@keyframes kf-ring {
  0% { transform: scale(0.9); opacity: 0.7; }
  100% { transform: scale(1.5); opacity: 0; }
}
.kf-fab__label {
  position: absolute;
  right: 68px;
  top: 50%;
  transform: translateY(-50%);
  white-space: nowrap;
  background: var(--primary-deep);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: var(--r-full);
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s var(--ease-out);
}
.kf-fab:hover .kf-fab__label { opacity: 1; }
@media (max-width: 600px) {
  .kf-fab { right: 18px; bottom: 18px; width: 54px; height: 54px; font-size: 22px; }
  .kf-fab__label { display: none; }
}

/* --- Modal --- */
.kf-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 24px;
  visibility: hidden;
  opacity: 0;
  transition: opacity .3s var(--ease-soft), visibility .3s;
}
.kf-modal.is-open { visibility: visible; opacity: 1; }

.kf-modal__mask {
  position: absolute;
  inset: 0;
  background: rgba(11, 29, 58, 0.66);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.kf-modal__panel {
  position: relative;
  width: 100%;
  max-width: 400px;
  background: #fff;
  border-radius: var(--r-xl);
  padding: 36px 32px 28px;
  text-align: center;
  box-shadow: var(--shadow-xl);
  transform: translateY(24px) scale(0.95);
  transition: transform .35s var(--ease-out);
  overflow: hidden;
}
.kf-modal.is-open .kf-modal__panel { transform: none; }
.kf-modal__panel::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 5px;
  background: var(--grad-gold);
}

.kf-modal__close {
  position: absolute;
  top: 14px; right: 14px;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--ink-50);
  color: var(--ink-500);
  font-size: 20px;
  line-height: 1;
  display: grid;
  place-items: center;
  transition: all .2s var(--ease-out);
}
.kf-modal__close:hover { background: var(--ink-100); color: var(--ink-900); transform: rotate(90deg); }

.kf-modal__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--green);
  background: rgba(22, 163, 74, 0.1);
  border: 1px solid rgba(22, 163, 74, 0.25);
  padding: 5px 12px;
  border-radius: var(--r-full);
  margin-bottom: 14px;
}
.kf-modal__badge::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green);
  animation: pulse 2.4s infinite;
}

.kf-modal__title {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 6px;
  color: var(--ink-900);
}
.kf-modal__sub {
  font-size: 14px;
  color: var(--ink-500);
  margin-bottom: 22px;
}

.kf-modal__qr {
  width: 232px;
  height: 232px;
  margin: 0 auto 18px;
  padding: 10px;
  border: 2px solid var(--ink-100);
  border-radius: var(--r-lg);
  background: #fff;
}
.kf-modal__qr img {
  width: 100%; height: 100%;
  object-fit: contain;
  border-radius: var(--r-sm);
}

.kf-modal__tip {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-700);
  line-height: 1.6;
  margin-bottom: 4px;
}
.kf-modal__tip small {
  display: block;
  font-size: 12px;
  font-weight: 400;
  color: var(--ink-400);
  margin-top: 4px;
}

.kf-modal__alt {
  display: inline-block;
  margin-top: 14px;
  font-size: 13px;
  color: var(--primary-mid);
  border-bottom: 1px dashed var(--primary-soft);
  padding-bottom: 2px;
}
.kf-modal__alt:hover { color: var(--gold-deep); border-color: var(--gold); }