:root {
  /* —— 颜色 —— */
  --navy: #071426;
  --navy-2: #0b1c32;
  --ink: #142033;
  --ink-soft: #3f4a5a;
  --muted: #667085;
  --gold: #d9aa59;
  --gold-2: #f5d486;
  --gold-deep: #b47a2b;
  --paper: #f7f3ed;
  --line: rgba(217, 170, 89, 0.34);

  /* —— 表面色 —— */
  --bg: #ffffff;
  --bg-soft: #faf8f4;
  --bg-cream: #fbf8f2;

  /* —— 阴影等级 —— */
  --shadow-xs: 0 2px 6px rgba(18, 30, 48, 0.05);
  --shadow-sm: 0 8px 20px rgba(18, 30, 48, 0.06);
  --shadow-md: 0 14px 32px rgba(18, 30, 48, 0.08);
  --shadow-lg: 0 24px 56px rgba(12, 20, 34, 0.14);
  --shadow-xl: 0 32px 72px rgba(12, 20, 34, 0.22);

  /* —— 圆角等级 —— */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;

  /* —— 字号等级 —— */
  --fs-display: clamp(48px, 6vw, 72px);
  --fs-h1: clamp(34px, 4vw, 50px);
  --fs-h2: clamp(26px, 2.6vw, 34px);
  --fs-h3: clamp(18px, 1.4vw, 21px);
  --fs-lead: clamp(15px, 1.2vw, 17px);
  --fs-body: 15px;
  --fs-caption: 13px;

  /* —— 行高 —— */
  --lh-tight: 1.18;
  --lh-snug: 1.35;
  --lh-normal: 1.7;
  --lh-loose: 1.85;

  /* —— 间距等级 —— */
  --sp-section-y: clamp(56px, 6vw, 96px);
  --sp-section-x: clamp(24px, 6vw, 96px);
  --sp-card: clamp(24px, 2vw, 32px);
  --sp-grid: clamp(20px, 2.4vw, 32px);
  --sp-stack: 14px;

  /* —— 字体族 —— */
  --font-serif: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", "STSong", SimSun, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: var(--lh-normal);
  background: var(--bg);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* —— 标题层级（全局基础） —— */
h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--ink);
  line-height: var(--lh-tight);
  letter-spacing: 0.02em;
}

p {
  margin: 0;
  line-height: var(--lh-loose);
  color: var(--ink-soft);
}

strong, b {
  font-weight: 700;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  padding: 0 clamp(22px, 6vw, 92px);
  color: #fff;
  background: rgba(5, 15, 30, 0.94);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark,
.brand-mark-img {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: var(--navy);
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gold-2), var(--gold-deep));
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
  box-shadow: 0 4px 12px rgba(217, 170, 89, 0.32);
  transition: transform 0.25s ease;
}

.brand-mark-img {
  width: auto;
  height: 42px;
  background: transparent;
  box-shadow: none;
  clip-path: none;
  object-fit: contain;
  transition: transform 0.25s ease, filter 0.25s ease;
}

.brand:hover .brand-mark,
.brand:hover .brand-mark-img {
  transform: rotate(-6deg);
}

.brand:hover .brand-mark-img {
  filter: drop-shadow(0 0 6px rgba(245, 212, 134, 0.5));
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-text strong {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold-2);
  white-space: nowrap;
}

.brand-text small {
  margin-top: 3px;
  font-family: var(--font-sans);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  color: rgba(255, 255, 255, 0.55);
}

.nav {
  display: flex;
  align-items: stretch;
  gap: clamp(16px, 2.4vw, 38px);
  height: 100%;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.nav a {
  position: relative;
  display: flex;
  align-items: center;
  min-width: 0;
  color: rgba(255, 255, 255, 0.78);
  transition: color 0.25s ease;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 18px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--gold-2));
  transition: width 0.3s ease, left 0.3s ease;
}

.nav a:hover {
  color: var(--gold-2);
}

.nav a:hover::after,
.nav a.active::after {
  width: 22px;
  left: calc(50% - 11px);
}

.nav a.active {
  color: var(--gold-2);
}

/* —— 汉堡菜单按钮（桌面隐藏，移动端显示） —— */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  margin: 0 auto;
  background: var(--gold-2);
  border-radius: 1px;
  transition: transform 0.3s ease, opacity 0.25s ease;
}

.hero {
  position: relative;
  min-height: 540px;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 72% 32%, rgba(217, 170, 89, 0.32), transparent 26%),
    radial-gradient(circle at 8% 80%, rgba(217, 170, 89, 0.08), transparent 30%),
    linear-gradient(110deg, #071426 0%, #0a1729 50%, #101e32 100%);
}

.hero-carousel {
  position: relative;
  display: grid;
}

.hero-slide {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(420px, 1.05fr);
  align-items: center;
  padding: clamp(72px, 9vw, 128px) clamp(28px, 7vw, 110px) clamp(80px, 9vw, 120px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.7s ease, visibility 0.7s ease;
  pointer-events: none;
}

.hero-slide.is-active {
  position: relative;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.hero-indicators {
  position: absolute;
  bottom: clamp(20px, 3vw, 32px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 4;
  display: flex;
  gap: 10px;
}

.hero-dot {
  width: 28px;
  height: 4px;
  padding: 0;
  border: 0;
  background: rgba(255, 255, 255, 0.28);
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.3s ease, width 0.3s ease;
}

.hero-dot:hover {
  background: rgba(255, 255, 255, 0.55);
}

.hero-dot.is-active {
  width: 44px;
  background: linear-gradient(90deg, var(--gold-2), var(--gold));
}

.hero-arrow {
  position: absolute;
  top: 50%;
  z-index: 4;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 32px;
  font-weight: 300;
  line-height: 1;
  background: rgba(7, 20, 38, 0.4);
  border: 1px solid rgba(245, 212, 134, 0.32);
  border-radius: 50%;
  cursor: pointer;
  transform: translateY(-50%);
  backdrop-filter: blur(8px);
  transition: all 0.25s ease;
}

.hero-arrow:hover {
  color: var(--gold-2);
  border-color: var(--gold-2);
  background: rgba(7, 20, 38, 0.6);
}

.hero-arrow-prev { left: clamp(12px, 2vw, 24px); }
.hero-arrow-next { right: clamp(12px, 2vw, 24px); }

.hero::before,
.advantage-band::before,
.footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(125deg, transparent 0 18%, rgba(217, 170, 89, 0.12) 18.1% 18.3%, transparent 18.4%),
    radial-gradient(circle at 10% 16%, rgba(217, 170, 89, 0.16) 0 1px, transparent 2px),
    radial-gradient(circle at 48% 58%, rgba(217, 170, 89, 0.18) 0 1px, transparent 2px);
  background-size: 420px 220px, 160px 160px, 210px 210px;
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 760px;
}

.section-line {
  display: block;
  width: 64px;
  height: 2px;
  margin-bottom: 36px;
  background: linear-gradient(90deg, var(--gold-2) 0%, var(--gold) 60%, transparent 100%);
}

.hero h1 {
  margin: 0 0 18px;
  color: var(--gold-2);
  font-family: var(--font-serif);
  font-size: var(--fs-display);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.hero h2 {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.45;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: rgba(255, 255, 255, 0.92);
}

.hero p {
  max-width: 640px;
  margin: 32px 0 44px;
  color: rgba(255, 255, 255, 0.74);
  font-family: var(--font-sans);
  font-size: var(--fs-lead);
  line-height: 1.8;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 144px;
  min-height: 50px;
  padding: 0 30px;
  color: #fff;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.06em;
  border: 1px solid rgba(245, 212, 134, 0.7);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.04);
  transition: all 0.25s ease;
  cursor: pointer;
}

.btn:hover {
  border-color: var(--gold-2);
  background: rgba(245, 212, 134, 0.1);
  transform: translateY(-1px);
}

.btn.primary {
  color: #2a1d08;
  background: linear-gradient(135deg, var(--gold-2) 0%, var(--gold) 100%);
  border-color: transparent;
  box-shadow: 0 8px 20px rgba(217, 170, 89, 0.32);
}

.btn.primary:hover {
  background: linear-gradient(135deg, #fbe199 0%, var(--gold-2) 100%);
  box-shadow: 0 12px 28px rgba(217, 170, 89, 0.42);
}

.hero-art {
  position: relative;
  min-height: 460px;
}

.hero-art img {
  position: absolute;
  right: -82px;
  top: -34px;
  width: min(690px, 58vw);
  height: 520px;
  object-fit: cover;
  object-position: center;
  border-radius: 52% 0 0 52%;
  opacity: 0.92;
  box-shadow: -36px 0 90px rgba(0, 0, 0, 0.42);
}

.hero-art::after {
  content: "";
  position: absolute;
  right: 36px;
  top: -26px;
  width: 560px;
  height: 560px;
  border: 1.5px solid rgba(217, 170, 89, 0.5);
  border-radius: 50%;
}

.floating-logo {
  position: absolute;
  left: 58px;
  top: 145px;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 78px;
  height: 78px;
  color: var(--navy);
  font-family: var(--font-serif);
  font-size: 44px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gold-2), var(--gold-deep));
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
  box-shadow: 0 12px 30px rgba(217, 170, 89, 0.35);
}

.mission-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(40px, 5vw, 80px);
  padding: clamp(48px, 5vw, 72px) var(--sp-section-x);
  background: linear-gradient(180deg, #fff, #f7f7f5);
}

.mission-band article {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 28px;
  align-items: center;
}

.mission-band article + article {
  position: relative;
  padding-left: clamp(40px, 5vw, 72px);
}

.mission-band article + article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 1px;
  height: 64%;
  background: linear-gradient(180deg, transparent, #d8cfc1 30%, #d8cfc1 70%, transparent);
  transform: translateY(-50%);
}

.round-icon {
  display: grid;
  place-items: center;
  width: 96px;
  height: 96px;
  color: var(--gold-deep);
  font-family: var(--font-serif);
  font-size: 48px;
  font-weight: 700;
  border: 1px solid #eadbc2;
  border-radius: 50%;
  background: linear-gradient(135deg, #fbf8f2, #f5ecd9);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

h2,
h3,
p {
  margin-top: 0;
}

.mission-band h3 {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.mission-band p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.mission-band p,
.soft-card p,
.solution-card p,
.image-card p,
.audience-grid p,
.strategy-grid p,
.footer p {
  margin-bottom: 0;
  color: #3f4a5a;
}

.section {
  padding: var(--sp-section-y) var(--sp-section-x);
}

.section.light {
  background: linear-gradient(180deg, #fff 0%, #faf8f4 100%);
}

.section.dark {
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 18% 86%, rgba(217, 170, 89, 0.14), transparent 28%),
    radial-gradient(circle at 82% 14%, rgba(217, 170, 89, 0.08), transparent 32%),
    linear-gradient(180deg, #071426, #0d1a2a);
}

.section.dark::before {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 200px;
  background: repeating-linear-gradient(18deg, transparent 0 16px, rgba(217, 170, 89, 0.08) 17px 18px);
  opacity: 0.45;
}

.section-title {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto clamp(36px, 4vw, 56px);
  text-align: center;
}

.section-title::before {
  content: "";
  display: block;
  width: 48px;
  height: 2px;
  margin: 0 auto 22px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.section-title h2,
.advantage-band h2,
.scene-band h2 {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: var(--fs-h2);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.section-title p {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-lead);
  font-weight: 400;
  line-height: 1.7;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.section-title.inverse h2,
.section-title.inverse p {
  color: #fff;
}

.section-title.inverse p {
  color: rgba(255, 255, 255, 0.7);
}

.section-title.inverse::before {
  background: linear-gradient(90deg, transparent, var(--gold-2), transparent);
}

.pain-grid,
.solution-grid,
.choice-grid,
.audience-grid,
.strategy-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--sp-grid);
}

.pain-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 1320px;
  margin: 0 auto;
}

.soft-card {
  min-height: 156px;
  padding: var(--sp-card);
  border: 1px solid #eadfd0;
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.85);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.soft-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold);
  box-shadow: var(--shadow-md);
}

.line-icon {
  float: left;
  display: grid;
  place-items: center;
  width: 60px;
  height: 60px;
  margin: 4px 22px 0 0;
  color: var(--navy);
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  border: 2px solid var(--navy);
  border-radius: 50%;
}

.soft-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--ink);
}

.soft-card p {
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.solution-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.solution-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 360px;
  padding: var(--sp-card);
  border: 1px solid rgba(217, 170, 89, 0.7);
  border-radius: var(--r-md);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.18);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.solution-card:hover {
  transform: translateY(-4px);
  border-color: var(--gold-2);
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.28);
}

.gold-icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 18px;
  color: var(--navy);
  font-size: 22px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gold-2), var(--gold));
  border-radius: var(--r-sm);
}

.solution-card h3 {
  margin: 0 0 14px;
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--gold-2);
}

.solution-card p {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.78);
}

.solution-card ul {
  margin: 0 0 18px;
  padding-left: 18px;
}

.solution-card li {
  margin-bottom: 6px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 13.5px;
  line-height: 1.75;
}

.solution-card strong {
  display: inline-block;
  margin-top: auto;
  padding-top: 14px;
  color: var(--gold-2);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.04em;
  border-top: 1px dashed rgba(217, 170, 89, 0.35);
}

.solution-card img {
  width: 100%;
  height: 68px;
  margin-top: 14px;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--r-sm);
}

.mini-dashboard,
.chart {
  height: 72px;
  margin-top: auto;
  padding: 12px;
  border: 1px solid rgba(245, 212, 134, 0.4);
  border-radius: var(--r-sm);
  background: rgba(0, 0, 0, 0.22);
}

.mini-dashboard {
  display: flex;
  gap: 10px;
}

.mini-dashboard span {
  flex: 1;
  border-radius: 3px;
  background: linear-gradient(180deg, rgba(217, 170, 89, 0.82), rgba(217, 170, 89, 0.18));
}

.chart {
  display: flex;
  align-items: flex-end;
  gap: 14px;
}

.chart i {
  flex: 1;
  display: block;
  height: 24px;
  background: linear-gradient(180deg, var(--gold-2), var(--gold));
  border-radius: 2px 2px 0 0;
}

.chart i:nth-child(2) { height: 38px; }
.chart i:nth-child(3) { height: 52px; }
.chart i:nth-child(4) { height: 34px; }

.choice-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 1320px;
  margin: 0 auto;
}

.image-card {
  position: relative;
  min-height: 168px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 38%;
  gap: 22px;
  align-items: center;
  padding: var(--sp-card);
  border: 1px solid #eadfd0;
  border-radius: var(--r-md);
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.image-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.image-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--ink);
}

.image-card p {
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.image-card img {
  width: 100%;
  height: 124px;
  object-fit: cover;
  border-radius: var(--r-sm);
}

.lock-art {
  align-self: center;
  justify-self: center;
  width: 124px;
  height: 124px;
  object-fit: cover;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
}

.advantage-band {
  position: relative;
  overflow: hidden;
  padding: var(--sp-section-y) var(--sp-section-x);
  color: #fff;
  background:
    radial-gradient(circle at 14% 22%, rgba(217, 170, 89, 0.08), transparent 30%),
    linear-gradient(180deg, #071426, #0a1728);
}

.advantage-band h2,
.scene-band h2 {
  position: relative;
  z-index: 1;
  margin: 0 0 14px;
  color: #fff;
  text-align: center;
}

.advantage-band h2::before,
.scene-band h2::before {
  content: "";
  display: block;
  width: 48px;
  height: 2px;
  margin: 0 auto 22px;
  background: linear-gradient(90deg, transparent, var(--gold-2), transparent);
}

.advantage-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(28px, 3vw, 44px);
  max-width: 1320px;
  margin: 0 auto;
}

.advantage-grid article {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 22px;
  align-items: center;
}

.advantage-grid span {
  display: grid;
  place-items: center;
  width: 80px;
  height: 80px;
  color: var(--gold-2);
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  border: 1.5px solid var(--gold);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(217, 170, 89, 0.1), transparent 70%);
}

.advantage-grid h3 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: #fff;
}

.advantage-grid p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.72);
}

.audience-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 1360px;
  margin: 0 auto;
}

.audience-grid article {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border: 1px solid #d9e0e8;
  border-radius: var(--r-md);
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.audience-grid article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.audience-grid h3,
.audience-grid p {
  padding: 0 24px;
}

.audience-grid h3 {
  margin: 24px 0 10px;
  padding-top: 0;
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--ink);
}

.audience-grid p {
  padding-bottom: 22px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.audience-grid img {
  width: 100%;
  height: 156px;
  margin-top: auto;
  object-fit: cover;
  order: -1;
}

.scene-band {
  padding: clamp(48px, 5vw, 72px) var(--sp-section-x);
  background: var(--bg-cream);
}

.scene-band h2 {
  color: var(--ink);
}

.scene-list {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 16px;
  max-width: 1320px;
  margin: clamp(28px, 3vw, 40px) auto 0;
}

.scene-list span {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 80px;
  padding: 14px 10px;
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-align: center;
  background: #fff;
  border: 1px solid #eadfd0;
  border-radius: var(--r-sm);
  box-shadow: var(--shadow-xs);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.scene-list span:hover {
  transform: translateY(-2px);
  border-color: var(--gold);
  box-shadow: var(--shadow-sm);
}

.scene-list span::before {
  content: "◇";
  color: var(--gold);
  font-size: 18px;
  line-height: 1;
}

.strategy-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 1320px;
  margin: 0 auto;
}

.strategy-grid article {
  position: relative;
  min-height: 152px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 28px 200px 28px 88px;
  border: 1px solid #eadfd0;
  border-radius: var(--r-md);
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.strategy-grid article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.strategy-grid b {
  position: absolute;
  left: 24px;
  top: 28px;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  color: #fff;
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold-2), var(--gold-deep));
  box-shadow: 0 4px 12px rgba(180, 122, 43, 0.35);
}

.strategy-grid h3 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--ink);
}

.strategy-grid p {
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.strategy-grid img {
  position: absolute;
  right: 0;
  top: 0;
  width: 176px;
  height: 100%;
  object-fit: cover;
}

.footer {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: clamp(28px, 3vw, 40px);
  padding: clamp(48px, 5vw, 72px) var(--sp-section-x) 28px;
  color: #fff;
  background:
    radial-gradient(circle at 12% 88%, rgba(217, 170, 89, 0.1), transparent 30%),
    linear-gradient(180deg, #050f1f 0%, #071426 100%);
}

.footer > * {
  position: relative;
  z-index: 1;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.footer-brand-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.footer-mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: var(--navy);
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--gold-2), var(--gold-deep));
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
  box-shadow: 0 6px 18px rgba(217, 170, 89, 0.28);
}

.footer-brand-icon {
  flex: 0 0 auto;
  display: block;
  width: auto;
  height: 38px;
  margin-top: 2px;
  object-fit: contain;
  transition: filter 0.25s ease;
}

.footer-brand:hover .footer-brand-icon {
  filter: drop-shadow(0 4px 16px rgba(245, 212, 134, 0.35));
}

.footer-brand-text {
  display: flex;
  flex-direction: column;
  align-self: start;
}

.footer-brand h2 {
  margin: 0;
  padding: 0;
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.3;
  color: var(--gold-2);
  white-space: nowrap;
}

.footer-brand-en {
  margin: 3px 0 0;
  padding: 0;
  font-family: var(--font-sans);
  font-size: 10px !important;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1.3;
  white-space: nowrap;
  color: rgba(255, 255, 255, 0.55);
}

.footer-brand-desc {
  max-width: 360px;
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.65);
}

.footer h2 {
  margin: 0;
}

.footer h3 {
  margin: 0 0 18px;
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--gold-2);
  text-transform: uppercase;
}

.footer p,
.footer a,
.footer span,
.footer address {
  display: block;
  color: rgba(255, 255, 255, 0.65);
  font-size: 14px;
  line-height: 1.85;
  font-style: normal;
  transition: color 0.2s ease;
}

.footer a:hover {
  color: var(--gold-2);
}

.footer a + a,
.footer span + span {
  margin-top: 10px;
}

.footer address {
  margin-top: 4px;
}

.copyright {
  margin: 0;
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
  letter-spacing: 0.04em;
}

/* —— 页脚主体三栏布局：品牌 / 导航 / 联系 —— */
.footer-main {
  display: grid;
  grid-template-columns: minmax(240px, 1.6fr) minmax(120px, 0.8fr) minmax(200px, 1.1fr);
  gap: clamp(32px, 4vw, 64px);
  align-items: start;
}

.footer-nav,
.footer-contact {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-contact {
  gap: 10px;
}

.footer .footer-contact h3 {
  margin-bottom: 0;
}

/* —— 底部信息条：版权 + 备案号 —— */
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer .footer-beian {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  white-space: nowrap;
  line-height: 1;
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
  letter-spacing: 0.04em;
  transition: color 0.2s ease;
}

.footer .footer-beian::before {
  content: "";
  display: inline-block;
  flex: 0 0 auto;
  align-self: center;
  width: 14px;
  height: 14px;
  margin-right: 7px;
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23d9aa59' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 3l7 3v5c0 4.5-3 8-7 10-4-2-7-5.5-7-10V6l7-3z'/%3E%3C/svg%3E");
  opacity: 0.85;
  transition: opacity 0.2s ease;
}

.footer .footer-beian:hover {
  color: var(--gold-2);
}

.footer .footer-beian:hover::before {
  opacity: 1;
}

/* 备案号编组：ICP + 公安备案并排，始终单行右对齐（不换行，避免公安号掉到下一行偏低） */
.footer-beian-group {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: flex-end;
  gap: 8px 18px;
}

/* 备案号之间的竖线分隔符（用 border-left，避免 ::after 伪元素影响 flex 对齐） */
.footer-beian-group .footer-beian + .footer-beian {
  padding-left: 18px;
  border-left: 1px solid rgba(255, 255, 255, 0.16);
}

/* 公安备案：警徽图标 */
.footer .footer-beian-police::before {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23d9aa59' stroke-width='1.7' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 2l2.5 2.5L18 4l-.5 3.5L21 9l-2 3 2 3-3.5 1.5L18 20l-3.5-.5L12 22l-2.5-2.5L6 20l.5-3.5L3 15l2-3-2-3 3.5-1.5L6 4l3.5.5z'/%3E%3Ccircle cx='12' cy='12' r='3.2'/%3E%3C/svg%3E");
}

/* ============================================================
 * 响应式断点 —— 三档制（≥1100 / 760–1099 / <760）
 * ============================================================ */

/* —— 平板（760–1099px） —— */
@media (max-width: 1099px) {
  .site-header {
    height: 64px;
    padding: 0 clamp(20px, 4vw, 32px);
  }

  .brand img {
    width: 120px;
    height: 30px;
  }

  .nav {
    gap: clamp(14px, 2vw, 26px);
    font-size: 13.5px;
  }

  .hero-slide {
    grid-template-columns: minmax(0, 1fr);
    min-height: 460px;
    padding: clamp(56px, 7vw, 80px) clamp(28px, 5vw, 56px) clamp(64px, 7vw, 88px);
  }

  .hero-art {
    position: absolute;
    inset: 0;
    min-height: 0;
    pointer-events: none;
  }

  .hero-art img {
    right: 0;
    top: 0;
    width: 46%;
    height: 100%;
    border-radius: 50% 0 0 50%;
    opacity: 0.85;
    box-shadow: -28px 0 72px rgba(0, 0, 0, 0.4);
  }

  .hero-art::after {
    right: 80px;
    top: 50%;
    transform: translateY(-50%);
    width: 360px;
    height: 360px;
    opacity: 0.7;
  }

  .floating-logo {
    display: none;
  }

  .hero-copy {
    max-width: 640px;
  }

  .mission-band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(28px, 4vw, 48px);
  }

  .pain-grid,
  .solution-grid,
  .audience-grid,
  .advantage-grid,
  .strategy-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .scene-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .strategy-grid article {
    padding: 24px 132px 24px 72px;
    min-height: 120px;
  }

  .strategy-grid b {
    left: 20px;
    top: 20px;
    width: 40px;
    height: 40px;
    font-size: 20px;
  }

  .strategy-grid img {
    width: 120px;
    right: 0;
  }

  .footer-main {
    grid-template-columns: minmax(200px, 1.4fr) repeat(2, minmax(140px, 1fr));
    gap: clamp(28px, 3vw, 40px);
  }
}

/* —— 移动端（<760px） —— */
@media (max-width: 759px) {
  body {
    line-height: 1.7;
    overflow-x: hidden;
  }

  /* —— 横向 header + 汉堡菜单 —— */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: 56px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    gap: 12px;
  }

  .brand {
    gap: 8px;
    min-width: 0;
  }

  .brand-mark-img {
    height: 36px;
    width: auto;
    max-width: 50px;
  }

  .brand-text {
    min-width: 0;
  }

  .brand-text strong {
    font-size: 16px;
    letter-spacing: 0.02em;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .brand-text small {
    display: none;
  }

  /* 汉堡按钮显示 */
  .nav-toggle {
    display: flex;
    flex: 0 0 auto;
  }

  /* 导航下拉菜单 */
  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    height: auto;
    padding: 6px 0;
    background: rgba(5, 15, 30, 0.98);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height 0.3s ease, opacity 0.25s ease, visibility 0.25s ease;
  }

  .site-header.nav-open .nav {
    max-height: 400px;
    opacity: 1;
    visibility: visible;
  }

  .nav a {
    width: 100%;
    padding: 14px 24px;
    font-size: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  }

  .nav a:last-child {
    border-bottom: 0;
  }

  .nav a::after {
    display: none;
  }

  .nav a:hover,
  .nav a.active {
    background: rgba(217, 170, 89, 0.1);
    color: var(--gold-2);
  }

  /* 汉堡变 X 动画 */
  .site-header.nav-open .nav-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .site-header.nav-open .nav-toggle-bar:nth-child(2) {
    opacity: 0;
  }

  .site-header.nav-open .nav-toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* —— Hero 区域 —— */
  .hero {
    min-height: auto;
  }

  .hero-slide {
    min-height: 480px;
    padding: 44px 20px 60px;
  }

  .hero h1 {
    font-size: clamp(30px, 9vw, 40px);
    margin-bottom: 14px;
  }

  .hero h2 {
    font-size: clamp(15px, 4.2vw, 19px);
  }

  .hero p {
    margin: 18px 0 26px;
    font-size: 14px;
  }

  .hero-actions {
    gap: 12px;
  }

  .btn {
    min-width: 120px;
    min-height: 44px;
    padding: 0 22px;
    font-size: 14px;
  }

  /* Hero 装饰图变为背景层 */
  .hero-art {
    position: absolute;
    inset: 0;
    min-height: 0;
    pointer-events: none;
  }

  .hero-art img {
    right: -100px;
    top: auto;
    bottom: 0;
    width: 60%;
    height: 55%;
    opacity: 0.45;
    border-radius: 50% 0 0 50%;
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.3);
  }

  .hero-art::after {
    right: 20px;
    top: auto;
    bottom: 8%;
    width: 220px;
    height: 220px;
    opacity: 0.35;
    transform: none;
  }

  .hero-arrow {
    width: 36px;
    height: 36px;
    font-size: 22px;
  }

  .hero-arrow-prev { left: 8px; }
  .hero-arrow-next { right: 8px; }

  .hero-indicators {
    bottom: 16px;
  }

  .hero-dot {
    width: 22px;
  }

  .hero-dot.is-active {
    width: 36px;
  }

  /* —— Mission band —— */
  .mission-band {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 36px 20px;
  }

  .mission-band article + article {
    padding-left: 0;
  }

  .mission-band article + article::before {
    display: none;
  }

  .mission-band article {
    grid-template-columns: 64px 1fr;
    gap: 16px;
  }

  .round-icon {
    width: 64px;
    height: 64px;
    font-size: 30px;
  }

  /* —— Section 间距 —— */
  .section {
    padding: 40px 20px;
  }

  .section-title {
    margin-bottom: 32px;
  }

  /* —— Grid 布局：单列 —— */
  .pain-grid,
  .solution-grid,
  .choice-grid,
  .audience-grid,
  .advantage-grid,
  .strategy-grid,
  .footer-main {
    grid-template-columns: 1fr;
  }

  .pain-grid,
  .choice-grid,
  .audience-grid,
  .strategy-grid,
  .advantage-grid {
    gap: 16px;
  }

  /* Soft cards */
  .soft-card {
    padding: 20px;
    min-height: auto;
  }

  .line-icon {
    width: 48px;
    height: 48px;
    font-size: 18px;
    margin: 2px 16px 0 0;
  }

  /* Solution cards */
  .solution-card {
    min-height: auto;
    padding: 20px;
  }

  /* Image cards */
  .image-card {
    grid-template-columns: 1fr;
    padding: 20px;
    text-align: left;
  }

  .image-card img,
  .lock-art {
    height: 160px;
  }

  .lock-art {
    width: 100%;
    max-width: 200px;
  }

  /* Advantage grid */
  .advantage-grid article {
    grid-template-columns: 64px 1fr;
    grid-template-areas: "icon title" "icon desc";
    gap: 6px 16px;
    align-items: start;
  }

  .advantage-grid article span {
    grid-area: icon;
    align-self: center;
  }

  .advantage-grid article h3 {
    grid-area: title;
    margin-bottom: 0;
  }

  .advantage-grid article p {
    grid-area: desc;
    margin-top: 0;
  }

  .advantage-grid span {
    width: 64px;
    height: 64px;
    font-size: 24px;
  }

  /* Audience grid */
  .audience-grid img {
    height: 140px;
  }

  .audience-grid h3,
  .audience-grid p {
    padding: 0 18px;
  }

  .audience-grid h3 {
    margin: 18px 0 8px;
  }

  .audience-grid p {
    padding-bottom: 18px;
  }

  /* Scene list */
  .scene-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  /* Strategy grid - 修复图片溢出 */
  .strategy-grid article {
    min-height: auto;
    padding: 22px 20px 0 76px;
    overflow: hidden;
  }

  .strategy-grid b {
    left: 16px;
    top: 22px;
    width: 40px;
    height: 40px;
    font-size: 20px;
  }

  .strategy-grid img {
    position: relative;
    right: auto;
    top: auto;
    width: calc(100% + 40px);
    height: 130px;
    margin: 14px -20px 0 -20px;
    border-radius: 0 0 var(--r-md) var(--r-md);
  }

  /* —— Footer —— */
  .footer {
    padding: 36px 20px 24px;
    text-align: left;
  }

  .footer-main {
    gap: 28px;
  }

  .footer-brand h2 {
    font-size: 20px;
  }

  .footer-brand-desc {
    max-width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .footer-beian-group {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .footer .footer-beian {
    font-size: 12px;
  }

  .footer .footer-beian::before {
    width: 13px;
    height: 13px;
  }
}

/* —— 超小屏（<480px）—— */
@media (max-width: 479px) {
  .site-header {
    padding: 0 14px;
  }

  .brand-text strong {
    font-size: 14px;
  }

  .brand-mark-img {
    height: 32px;
    max-width: 44px;
  }

  .hero-slide {
    min-height: 440px;
    padding: 36px 16px 56px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero h2 {
    font-size: 15px;
  }

  .hero p {
    font-size: 13px;
    margin: 14px 0 22px;
  }

  .hero-art img {
    width: 68%;
    opacity: 0.35;
  }

  .hero-art::after {
    width: 170px;
    height: 170px;
  }

  .hero-arrow {
    width: 32px;
    height: 32px;
    font-size: 18px;
  }

  .btn {
    min-width: 100%;
  }

  .hero-actions {
    gap: 10px;
  }

  .section {
    padding: 32px 16px;
  }

  .section-title {
    margin-bottom: 24px;
  }

  .mission-band {
    padding: 28px 16px;
  }

  .mission-band article {
    grid-template-columns: 56px 1fr;
    gap: 14px;
  }

  .round-icon {
    width: 56px;
    height: 56px;
    font-size: 26px;
  }

  .soft-card,
  .solution-card,
  .image-card {
    padding: 16px;
  }

  .line-icon {
    width: 42px;
    height: 42px;
    font-size: 16px;
    margin-right: 12px;
  }

  .advantage-grid article {
    grid-template-columns: 56px 1fr;
    gap: 4px 14px;
  }

  .advantage-grid span {
    width: 56px;
    height: 56px;
    font-size: 22px;
  }

  .audience-grid img {
    height: 120px;
  }

  .scene-list {
    gap: 10px;
  }

  .scene-list span {
    font-size: 13px;
    min-height: 68px;
    padding: 12px 8px;
  }

  .strategy-grid article {
    padding: 20px 16px 0 68px;
  }

  .strategy-grid b {
    left: 14px;
    top: 20px;
    width: 38px;
    height: 38px;
    font-size: 18px;
  }

  .strategy-grid img {
    width: calc(100% + 32px);
    height: 120px;
    margin: 12px -16px 0 -16px;
  }

  .footer {
    padding: 28px 16px 20px;
  }

  .footer-brand h2 {
    font-size: 18px;
  }

  .footer-brand-icon {
    height: 32px;
  }
}