/* ==========================================================================
   ln186.com V2 设计系统 — 深蓝科技风
   主色 #07182C / #102D4E · 强调色 #087FA8 / #56D7F2
   服务器产品垂直获客 · 百度SEO长尾流量
   ========================================================================== */

/* ---------- 1. Tokens ---------- */
:root {
  /* 主色：深海军蓝 */
  --navy-900: #07182C;
  --navy-800: #0A2138;
  --navy-700: #102D4E;
  --navy-600: #163C66;
  --navy-500: #1E4F82;

  /* 强调色：青蓝色 */
  --cyan-600: #087FA8;
  --cyan-500: #0B9BD1;
  --cyan-400: #2DB8E8;
  --cyan-300: #56D7F2;
  --cyan-100: #C9F0FB;

  /* 内容区背景 */
  --bg-soft: #F2F6FA;
  --bg-soft-2: #EAF0F7;
  --white: #FFFFFF;

  /* 文字 */
  --ink: #1A2332;
  --ink-2: #2D3A4F;
  --muted: #5A6B7E;
  --muted-2: #8A99AB;
  --line: #DCE5EF;
  --line-2: #E8EFF7;

  /* 功能色 */
  --ok: #12B76A;
  --warn: #F79009;
  --danger: #E5484D;

  /* 字体 */
  --font-sans: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC",
    "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-num: "Inter", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei",
    -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Consolas", monospace;

  /* 圆角 */
  --radius-s: 8px;
  --radius: 12px;
  --radius-l: 16px;
  --radius-xl: 22px;

  /* 阴影 */
  --shadow-s: 0 1px 2px rgba(7, 24, 44, 0.06), 0 2px 8px rgba(7, 24, 44, 0.04);
  --shadow: 0 2px 6px rgba(7, 24, 44, 0.06), 0 12px 28px rgba(7, 24, 44, 0.08);
  --shadow-l: 0 6px 16px rgba(7, 24, 44, 0.08), 0 24px 56px rgba(7, 24, 44, 0.12);
  --shadow-cyan: 0 8px 24px rgba(8, 127, 168, 0.25);

  /* 布局 */
  --container: 1280px;
  --container-narrow: 960px;
  --gutter: 32px;
  --header-h: 68px;

  /* 动效 */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ---------- 2. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 20px);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 700; line-height: 1.3; }
p { margin: 0; }
table { border-collapse: collapse; width: 100%; }
input, textarea, select { font: inherit; }

/* ---------- 3. Layout ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

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

.section { padding: 80px 0; }
.section-sm { padding: 48px 0; }
.section-lg { padding: 120px 0; }

.section-dark { background: var(--navy-900); color: #C7D5E6; }
.section-dark h2, .section-dark h3 { color: #fff; }

.section-soft { background: var(--bg-soft); }
.section-soft-2 { background: var(--bg-soft-2); }

/* ---------- 4. Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(7, 24, 44, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(86, 215, 242, 0.12);
  z-index: 1000;
  transition: background 0.3s var(--ease-out);
}

.site-header.scrolled {
  background: rgba(7, 24, 44, 0.98);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.header-inner {
  max-width: var(--container);
  height: 100%;
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  color: #fff;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.logo-mark {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--cyan-600), var(--cyan-400));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
  font-weight: 800;
  font-family: var(--font-num);
  box-shadow: 0 2px 12px rgba(8, 127, 168, 0.4);
}

.logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.logo-text small { font-size: 11px; font-weight: 400; color: var(--cyan-300); letter-spacing: 1px; }

.nav-main {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.nav-main a {
  padding: 8px 11px;
  font-size: 15px;
  font-weight: 500;
  color: #B8C8DA;
  border-radius: 8px;
  transition: all 0.2s var(--ease-out);
  position: relative;
  white-space: nowrap;
}

.nav-main a:hover,
.nav-main a.active {
  color: #fff;
  background: rgba(86, 215, 242, 0.1);
}

.nav-main a.active::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 50%;
  transform: translateX(-50%);
  width: 20px; height: 2px;
  background: var(--cyan-400);
  border-radius: 2px;
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.header-phone {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan-300);
  font-family: var(--font-num);
  white-space: nowrap;
  text-decoration: none;
  cursor: pointer;
  transition: opacity 0.2s var(--ease-out);
}

.header-phone:hover {
  opacity: 0.82;
}

/* 点击拨打链接：继承上下文颜色，悬停高亮 */
.tel-link {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px dotted rgba(184, 200, 218, 0.45);
  transition: color 0.2s var(--ease-out), border-color 0.2s var(--ease-out);
  white-space: nowrap;
}

.tel-link:hover {
  color: var(--cyan-300);
  border-color: var(--cyan-300);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: var(--radius-s);
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s var(--ease-out);
  white-space: nowrap;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--cyan-600), var(--cyan-500));
  color: #fff;
  box-shadow: var(--shadow-cyan);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(8, 127, 168, 0.35);
}

.btn-cyan {
  background: var(--cyan-400);
  color: var(--navy-900);
  font-weight: 700;
}

.btn-cyan:hover {
  background: var(--cyan-300);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--cyan-300);
  border: 1.5px solid rgba(86, 215, 242, 0.4);
}

.btn-outline:hover {
  border-color: var(--cyan-400);
  background: rgba(86, 215, 242, 0.08);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
}

.btn-lg { padding: 14px 32px; font-size: 16px; }
.btn-sm { padding: 7px 16px; font-size: 14px; }

/* ---------- 5. Hero ---------- */
.hero {
  position: relative;
  min-height: 620px;
  padding: 140px 0 80px;
  background: linear-gradient(160deg, var(--navy-900) 0%, var(--navy-700) 50%, var(--navy-800) 100%);
  color: #fff;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 800px 400px at 80% 20%, rgba(8, 127, 168, 0.18), transparent),
    radial-gradient(ellipse 600px 300px at 20% 80%, rgba(86, 215, 242, 0.1), transparent);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(86, 215, 242, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(86, 215, 242, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.6), transparent 70%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,0.6), transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-content { max-width: 580px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(86, 215, 242, 0.1);
  border: 1px solid rgba(86, 215, 242, 0.25);
  color: var(--cyan-300);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 24px;
}

.hero-badge .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan-300);
  box-shadow: 0 0 8px var(--cyan-300);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: 48px;
  line-height: 1.18;
  font-weight: 800;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

.hero h1 .accent {
  background: linear-gradient(135deg, var(--cyan-400), var(--cyan-300));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 18px;
  line-height: 1.75;
  color: #A8BED4;
  margin-bottom: 32px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.hero-note {
  font-size: 13px;
  color: var(--muted-2);
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-visual {
  position: relative;
  height: 420px;
  border-radius: var(--radius-l);
  background: linear-gradient(135deg, rgba(16, 45, 78, 0.6), rgba(7, 24, 44, 0.8));
  border: 1px solid rgba(86, 215, 242, 0.15);
  overflow: hidden;
  box-shadow: var(--shadow-l);
}

.hero-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(90deg, transparent, transparent 40px, rgba(86,215,242,0.05) 40px, rgba(86,215,242,0.05) 41px),
    repeating-linear-gradient(0deg, transparent, transparent 40px, rgba(86,215,242,0.05) 40px, rgba(86,215,242,0.05) 41px);
}

.hero-visual-content {
  position: absolute;
  inset: 0;
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hero-stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.hero-stat {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(86, 215, 242, 0.12);
  border-radius: var(--radius-s);
  padding: 16px;
  text-align: center;
}

.hero-stat .num {
  font-family: var(--font-num);
  font-size: 28px;
  font-weight: 800;
  color: var(--cyan-300);
  line-height: 1;
}

.hero-stat .label {
  font-size: 12px;
  color: #8A9DB5;
  margin-top: 6px;
}

/* ---------- 6. Product Cards ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: all 0.3s var(--ease-out);
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan-600), var(--cyan-400));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease-out);
}

.product-card:hover {
  border-color: var(--cyan-400);
  box-shadow: var(--shadow-l);
  transform: translateY(-4px);
}

.product-card:hover::before {
  transform: scaleX(1);
}

.product-card .icon {
  width: 52px; height: 52px;
  border-radius: var(--radius-s);
  background: linear-gradient(135deg, rgba(8,127,168,0.1), rgba(86,215,242,0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--cyan-600);
}

.product-card h3 {
  font-size: 22px;
  color: var(--navy-800);
  margin-bottom: 12px;
}

.product-card p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.product-card .features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.product-card .tag {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--bg-soft);
  color: var(--cyan-600);
  font-weight: 500;
}

.product-card .link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--cyan-600);
}

.product-card .link:hover {
  color: var(--cyan-500);
  gap: 10px;
}

/* ---------- 7. Section Heading ---------- */
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-head .eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--cyan-600);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: 36px;
  color: var(--navy-800);
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}

.section-dark .section-head h2 { color: #fff; }

.section-head p {
  font-size: 17px;
  color: var(--muted);
  line-height: 1.7;
}

.section-dark .section-head p { color: #A8BED4; }

.section-head.left {
  text-align: left;
  margin: 0 0 40px;
}

/* ---------- 8. Selection Guide Grid ---------- */
.sel-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.sel-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: all 0.3s var(--ease-out);
}

.sel-card:hover {
  border-color: var(--cyan-400);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.sel-card .num {
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 700;
  color: var(--cyan-600);
  margin-bottom: 12px;
}

.sel-card h3 {
  font-size: 18px;
  color: var(--navy-800);
  margin-bottom: 10px;
}

.sel-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.65;
}

/* ---------- 9. Scenario Cards ---------- */
.scn-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scn-card {
  position: relative;
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  transition: all 0.3s var(--ease-out);
}

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

.scn-card . scn-banner {
  height: 140px;
  background: linear-gradient(135deg, var(--navy-700), var(--cyan-600));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 40px;
}

.scn-card .scn-body {
  padding: 24px;
}

.scn-card h3 {
  font-size: 20px;
  color: var(--navy-800);
  margin-bottom: 10px;
}

.scn-card p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 16px;
}

.scn-card .link {
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan-600);
}

/* ---------- 10. Stats / Company ---------- */
.stats-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
  background: linear-gradient(135deg, var(--navy-800), var(--navy-700));
}

.stat-item {
  padding: 36px 24px;
  text-align: center;
  border-right: 1px solid rgba(86, 215, 242, 0.1);
}

.stat-item:last-child { border-right: none; }

.stat-item .num {
  font-family: var(--font-num);
  font-size: 40px;
  font-weight: 800;
  color: var(--cyan-300);
  line-height: 1;
}

.stat-item .num .unit {
  font-size: 18px;
  color: var(--cyan-400);
  margin-left: 2px;
}

.stat-item .label {
  font-size: 14px;
  color: #A8BED4;
  margin-top: 10px;
}

/* ---------- 11. Process / Timeline ---------- */
.process-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

.process-flow::before {
  content: '';
  position: absolute;
  top: 32px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan-600), var(--cyan-400));
  opacity: 0.3;
}

.process-step {
  text-align: center;
  padding: 0 16px;
  position: relative;
}

.process-step .circle {
  width: 64px; height: 64px;
  border-radius: 50%;
  background: var(--white);
  border: 2px solid var(--cyan-400);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 800;
  color: var(--cyan-600);
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 16px rgba(8, 127, 168, 0.15);
}

.process-step h3 {
  font-size: 17px;
  color: var(--navy-800);
  margin-bottom: 8px;
}

.process-step p {
  font-size: 14px;
  color: var(--muted);
}

/* ---------- 12. FAQ ---------- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  margin-bottom: 12px;
  background: var(--white);
  overflow: hidden;
  transition: all 0.2s var(--ease-out);
}

.faq-item:hover {
  border-color: var(--cyan-400);
}

.faq-item summary {
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--navy-800);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: '+';
  font-size: 22px;
  color: var(--cyan-600);
  font-weight: 300;
  transition: transform 0.2s;
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item .faq-answer {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.75;
}

/* ---------- 13. Contact Form ---------- */
.contact-band {
  background: linear-gradient(135deg, var(--navy-900), var(--navy-700));
  border-radius: var(--radius-xl);
  padding: 56px;
  color: #fff;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: center;
}

.contact-band h2 {
  font-size: 30px;
  margin-bottom: 16px;
}

.contact-band p {
  color: #A8BED4;
  font-size: 16px;
  margin-bottom: 24px;
}

.contact-info-list { margin-top: 24px; }

.contact-info-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  font-size: 15px;
  color: #C7D5E6;
}

.contact-info-list .ic {
  width: 36px; height: 36px;
  border-radius: 8px;
  background: rgba(86, 215, 242, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan-300);
  flex-shrink: 0;
}

.form-grid {
  display: grid;
  gap: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: #C7D5E6;
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-s);
  border: 1px solid rgba(86, 215, 242, 0.15);
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  font-size: 15px;
  transition: all 0.2s;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: #5A6B7E; }

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--cyan-400);
  background: rgba(255, 255, 255, 0.08);
}

.form-group select option { background: var(--navy-700); color: #fff; }

.form-note {
  font-size: 13px;
  color: #8A9DB5;
}

/* ---------- 14. Breadcrumb ---------- */
.breadcrumb {
  padding: 24px 0;
  font-size: 14px;
}

.breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumb li {
  color: var(--muted);
}

.breadcrumb li::after {
  content: '/';
  margin-left: 8px;
  color: var(--line);
}

.breadcrumb li:last-child::after { display: none; }
.breadcrumb li:last-child { color: var(--navy-800); font-weight: 500; }
.breadcrumb a:hover { color: var(--cyan-600); }

/* ---------- 15. Page Hero (sub pages) ---------- */
.page-hero {
  background: linear-gradient(160deg, var(--navy-900), var(--navy-700));
  color: #fff;
  padding: 120px 0 56px;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 600px 200px at 80% 30%, rgba(8,127,168,0.15), transparent);
}

.page-hero .container { position: relative; }

.page-hero h1 {
  font-size: 36px;
  margin-bottom: 16px;
}

.page-hero p {
  font-size: 17px;
  color: #A8BED4;
  max-width: 680px;
}

/* ---------- 16. Content Layout ---------- */
.content-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}

.content-main { font-size: 16px; line-height: 1.85; }

.content-main h2 {
  font-size: 26px;
  color: var(--navy-800);
  margin: 40px 0 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--line);
  position: relative;
}

.content-main h2::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 60px; height: 2px;
  background: var(--cyan-500);
}

.content-main h3 {
  font-size: 20px;
  color: var(--navy-700);
  margin: 28px 0 12px;
}

.content-main p { margin-bottom: 16px; color: var(--ink-2); }

.content-main ul, .content-main ol {
  margin: 12px 0 20px;
  padding-left: 24px;
}

.content-main ul li, .content-main ol li {
  margin-bottom: 8px;
  color: var(--ink-2);
}

.content-main ul li { list-style: disc; }
.content-main ol li { list-style: decimal; }

/* Sidebar */
.sidebar {
  position: sticky;
  top: calc(var(--header-h) + 20px);
}

.sidebar-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}

.sidebar-card h3 {
  font-size: 16px;
  color: var(--navy-800);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.sidebar-nav li {
  margin-bottom: 4px;
}

.sidebar-nav a {
  display: block;
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--ink-2);
  transition: all 0.15s;
}

.sidebar-nav a:hover {
  background: var(--bg-soft);
  color: var(--cyan-600);
  padding-left: 16px;
}

/* ---------- 17. Spec Table ---------- */
.spec-table {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 24px 0;
}

.spec-table table {
  width: 100%;
}

.spec-table th,
.spec-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

.spec-table th {
  background: var(--bg-soft);
  font-weight: 600;
  color: var(--navy-800);
  font-size: 14px;
}

.spec-table td {
  font-size: 15px;
  color: var(--ink-2);
}

.spec-table tr:last-child td { border-bottom: none; }

.spec-table tr:hover td { background: var(--bg-soft-2); }

/* ---------- 18. CTA Band ---------- */
.cta-band {
  background: linear-gradient(135deg, var(--cyan-600), var(--cyan-500));
  border-radius: var(--radius-l);
  padding: 48px;
  color: #fff;
  text-align: center;
}

.cta-band h2 {
  font-size: 28px;
  margin-bottom: 12px;
}

.cta-band p {
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: 24px;
}

/* ---------- 19. Footer ---------- */
.site-footer {
  background: var(--navy-900);
  color: #8A9DB5;
  padding: 64px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .logo { margin-bottom: 16px; }

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: #6B7E94;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 15px;
  color: #C7D5E6;
  margin-bottom: 16px;
  font-weight: 600;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  font-size: 14px;
  color: #6B7E94;
  transition: color 0.15s;
}

.footer-col ul a:hover {
  color: var(--cyan-300);
}

.footer-bottom {
  border-top: 1px solid rgba(86, 215, 242, 0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
}

.footer-bottom a { color: #6B7E94; }
.footer-bottom a:hover { color: var(--cyan-300); }

/* ---------- 20. Mobile Nav ---------- */
.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: #fff;
  font-size: 20px;
}

/* ---------- 21. Reveal Animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

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

.reveal[data-delay="1"] { transition-delay: 0.1s; }
.reveal[data-delay="2"] { transition-delay: 0.2s; }
.reveal[data-delay="3"] { transition-delay: 0.3s; }
.reveal[data-delay="4"] { transition-delay: 0.4s; }

/* ---------- 22. Responsive ---------- */
@media (max-width: 1320px) {
  .header-phone { display: none; }
}

@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero-visual { height: 320px; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .sel-grid { grid-template-columns: repeat(2, 1fr); }
  .scn-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-band { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(1), .stat-item:nth-child(2) { border-bottom: 1px solid rgba(86,215,242,0.1); }
  .content-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-band { grid-template-columns: 1fr; padding: 40px; }
}

@media (max-width: 768px) {
  :root { --header-h: 60px; --gutter: 20px; }
  
  .nav-main, .header-phone { display: none; }
  .nav-toggle { display: flex; align-items: center; justify-content: center; }
  
  .nav-main.open {
    display: flex;
    position: fixed;
    top: var(--header-h); left: 0; right: 0;
    flex-direction: column;
    background: var(--navy-900);
    padding: 20px;
    gap: 4px;
    border-bottom: 1px solid rgba(86,215,242,0.1);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
  
  .nav-main.open a {
    width: 100%;
    padding: 14px 16px;
    font-size: 16px;
  }
  
  .hero { min-height: auto; padding: 110px 0 56px; }
  .hero h1 { font-size: 32px; }
  .hero-sub { font-size: 16px; }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; }
  
  .section { padding: 56px 0; }
  .section-head h2 { font-size: 26px; }
  
  .product-grid { grid-template-columns: 1fr; }
  .sel-grid { grid-template-columns: 1fr; }
  .scn-grid { grid-template-columns: 1fr; }
  .stats-band { grid-template-columns: 1fr 1fr; }
  .process-flow { grid-template-columns: 1fr 1fr; gap: 32px 0; }
  .process-flow::before { display: none; }
  
  .form-row { grid-template-columns: 1fr; }
  .contact-band { padding: 28px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  
  .page-hero { padding: 100px 0 40px; }
  .page-hero h1 { font-size: 26px; }
  
  .cta-band { padding: 32px 24px; }
  .cta-band h2 { font-size: 22px; }
  
  .btn-lg { padding: 12px 24px; font-size: 15px; }
}