/* ==========================================================================
   024cloud V2 · 全站设计系统
   沈阳云计算科技有限公司 — 算力 · 安全 · 本地温度
   移动优先 · WCAG 2.2 AA · 现代 CSS（自定义属性 / clamp / grid / :has）
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  /* 品牌深空蓝 */
  --navy-900: #0A1A2F;
  --navy-800: #14304F;
  --navy-700: #1B3A5C;
  /* 品牌蓝 */
  --blue-600: #1E6FEB;
  --blue-700: #1858C4;
  --blue-050: #EAF2FE;
  /* 算力青 */
  --cyan-500: #12B8C4;
  --cyan-400: #2FD9E0;
  --cyan-300: #62E4EA;
  --cyan-050: #E3EEFF;
  /* 中性 / 语义 */
  --ink: #16202E;
  --ink-80: #3A4757;
  --gray: #5A6B7F;
  --gray-light: #8A98A8;
  --line: #DCE4ED;
  --line-soft: #EAF0F6;
  --bg: #FFFFFF;
  --bg-soft: #F5F8FC;
  --bg-tint: #EEF4FB;
  --green: #16A34A;
  --green-bg: #E9F8EF;
  --amber: #B45309;
  --amber-bg: #FDF3E3;
  --red: #DC2626;

  /* 排版 */
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC",
    "HarmonyOS Sans SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system,
    sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Cascadia Code", Consolas,
    "Courier New", monospace;

  --fs-hero: clamp(1.95rem, 1.2rem + 3.4vw, 3.3rem);     /* ≥32px */
  --fs-h2: clamp(1.5rem, 1.2rem + 1.4vw, 2.05rem);       /* ≥24px */
  --fs-h3: clamp(1.06rem, 1rem + 0.4vw, 1.3125rem);      /* ≥17px */
  --fs-body: 1rem;                                        /* 16px */
  --fs-sm: 0.9375rem;                                     /* 15px */
  --fs-xs: 0.8125rem;

  --lh-body: 1.75;

  /* 空间与形状 */
  --container: 1200px;
  --header-h: 64px;
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(10, 26, 47, 0.06), 0 2px 8px rgba(10, 26, 47, 0.05);
  --shadow-md: 0 2px 6px rgba(10, 26, 47, 0.07), 0 10px 28px rgba(10, 26, 47, 0.09);
  --shadow-lg: 0 4px 12px rgba(10, 26, 47, 0.08), 0 18px 48px rgba(10, 26, 47, 0.14);
  --ring: 0 0 0 3px rgba(30, 111, 235, 0.35);

  /* 动效 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 0.28s;

  color-scheme: light;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; }

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  background: #FFFFFF;
  color: #16202E;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, picture, svg, video, canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

a { color: var(--blue-600); text-decoration: none; }
a:hover { text-decoration: underline; }

ul, ol { padding: 0; list-style: none; }

table { border-collapse: collapse; width: 100%; }

:focus-visible {
  outline: 2px solid var(--blue-600);
  outline-offset: 2px;
  border-radius: 4px;
}

::selection { background: var(--cyan-300); color: var(--navy-900); }

/* ---------- 可访问性工具 ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--navy-900);
  color: #fff;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  font-size: var(--fs-sm);
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 0; text-decoration: none; }

.vh {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 布局 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 20px;
}

.section { padding-block: clamp(2.75rem, 1.5rem + 5vw, 4.75rem); }
.section--tight { padding-block: clamp(2rem, 1rem + 3.5vw, 3.25rem); }
.section--soft { background: var(--bg-soft); }
.section--tint { background: linear-gradient(180deg, var(--bg-tint), #fff); }

.section-head { max-width: 760px; margin-bottom: clamp(1.5rem, 1rem + 2vw, 2.5rem); }
.section-head--center { margin-inline: auto; text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: #12B8C4;
  color: var(--cyan-500);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 2px;
  background: linear-gradient(90deg, var(--cyan-400), var(--blue-600));
  border-radius: 2px;
}
.section-head--center .eyebrow::before { display: none; }

h1, h2, h3, h4 { line-height: 1.3; font-weight: 700; color: #0A1A2F; }

.section-title { font-size: var(--fs-h2); }
.section-desc { margin-top: 12px; color: var(--gray); font-size: var(--fs-sm); }

.grid { display: grid; gap: 20px; }
.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }
.grid--4 { grid-template-columns: 1fr; }

@media (min-width: 640px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
  .grid--2-1 { grid-template-columns: 2fr 1fr; }
  .grid--1-2 { grid-template-columns: 1fr 2fr; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 11px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: 700;
  line-height: 1.4;
  cursor: pointer;
  text-decoration: none !important;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    background var(--dur) var(--ease), border-color var(--dur) var(--ease);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px) scale(0.99); }

.btn--primary {
  background: #1E6FEB;
  background: linear-gradient(135deg, var(--blue-600), var(--cyan-500));
  color: #fff;
  box-shadow: 0 6px 18px rgba(30, 111, 235, 0.32);
}
.btn--primary:hover { box-shadow: 0 10px 26px rgba(30, 111, 235, 0.4); transform: translateY(-1px); }

.btn--ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.55);
  color: #fff;
}
.btn--ghost:hover { background: rgba(255, 255, 255, 0.12); border-color: #fff; }

.btn--outline {
  background: #fff;
  border-color: var(--line);
  color: var(--navy-900);
}
.btn--outline:hover { border-color: var(--blue-600); color: var(--blue-600); }

.btn--sm { min-height: 38px; padding: 8px 16px; font-size: var(--fs-xs); }
.btn--lg { min-height: 52px; padding: 14px 32px; font-size: var(--fs-body); }
.btn--block { width: 100%; }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* ==========================================================================
   顶部导航（深空蓝玻璃拟态 · 适配品牌 LOGO）
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #0A1A2F;
  background: rgba(10, 26, 47, 0.88);
  -webkit-backdrop-filter: blur(16px) saturate(1.5);
  backdrop-filter: blur(16px) saturate(1.5);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: box-shadow var(--dur) var(--ease), background var(--dur) var(--ease);
}
.site-header.is-scrolled {
  background: #0A1A2F;
  background: rgba(10, 26, 47, 0.96);
  box-shadow: 0 8px 30px rgba(10, 26, 47, 0.35);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none !important;
}
.brand__logo {
  width: 148px;
  height: auto;
  display: block;
}
.brand__logo--footer { width: 172px; }

.main-nav { display: none; margin-left: auto; }
.main-nav__list { display: flex; align-items: center; gap: 2px; }

.main-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 44px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  color: rgba(226, 238, 255, 0.88);
  white-space: nowrap;
  text-decoration: none !important;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.main-nav__link:hover, .main-nav__link:focus-visible {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  text-decoration: none;
}
.main-nav__link[aria-current="page"] {
  color: var(--cyan-300);
  font-weight: 700;
  background: rgba(47, 217, 224, 0.12);
}
.main-nav__link .caret { width: 10px; height: 10px; transition: transform var(--dur) var(--ease); opacity: 0.7; }

.nav-item { position: relative; }
.nav-item:hover .main-nav__link .caret,
.nav-item:focus-within .main-nav__link .caret { transform: rotate(180deg); }

.nav-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  min-width: 216px;
  padding: 10px;
  background: #fff;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, 8px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
    visibility var(--dur) var(--ease);
}
.nav-item:hover .nav-dropdown,
.nav-item:focus-within .nav-dropdown { opacity: 1; visibility: visible; transform: translate(-50%, 0); }

.nav-dropdown a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  color: var(--ink-80);
  text-decoration: none !important;
}
.nav-dropdown a:hover { background: var(--blue-050); color: var(--blue-700); }
.nav-dropdown svg { width: 18px; height: 18px; color: var(--blue-600); flex-shrink: 0; }

.header-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.header-tel {
  display: none;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: #fff;
  font-size: 0.9375rem;
  text-decoration: none !important;
  font-variant-numeric: tabular-nums;
}
.header-tel svg { width: 18px; height: 18px; color: var(--cyan-300); }
.header-tel:hover { color: var(--cyan-300); text-decoration: none; }
.header-cta { display: none; }

@media (min-width: 1080px) {
  .main-nav { display: block; }
  .header-actions { margin-left: 12px; }
  .header-tel, .header-cta { display: inline-flex; }
}

/* 移动端汉堡按钮 */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  margin-left: auto;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.nav-toggle__bars, .nav-toggle__bars::before, .nav-toggle__bars::after {
  content: "";
  display: block;
  width: 20px; height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle__bars::before { transform: translateY(-6px); }
.nav-toggle__bars::after { transform: translateY(4px); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: rotate(-45deg) translateY(0); }

@media (min-width: 1080px) { .nav-toggle { display: none; } }

/* 移动端抽屉（深色） */
.mobile-nav {
  position: fixed;
  top: 64px;
  top: var(--header-h);
  left: 0; right: 0; bottom: 0;
  z-index: 99;
  background: #0A1A2F;
  background:
    radial-gradient(600px 300px at 90% 0%, rgba(47, 217, 224, 0.12), transparent 60%),
    var(--navy-900);
  padding: 20px;
  overflow-y: auto;
  visibility: hidden;
  opacity: 0;
  transition: opacity var(--dur) var(--ease), visibility var(--dur) var(--ease);
}
.mobile-nav.is-open { visibility: visible; opacity: 1; }
.mobile-nav__group { border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
.mobile-nav__group > a, .mobile-nav__group > button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 52px;
  padding: 12px 4px;
  background: none;
  border: 0;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  text-align: left;
  cursor: pointer;
  text-decoration: none !important;
}
.mobile-nav__group > button .chev { width: 14px; height: 14px; color: var(--cyan-300); transition: transform var(--dur) var(--ease); }
.mobile-nav__group > button[aria-expanded="true"] .chev { transform: rotate(180deg); }
.mobile-nav__sub { display: none; padding: 4px 0 12px; }
.mobile-nav__sub.is-open { display: block; }
.mobile-nav__sub a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 46px;
  padding: 10px 4px 10px 14px;
  font-size: var(--fs-sm);
  color: rgba(226, 238, 255, 0.78);
  text-decoration: none !important;
  border-left: 2px solid rgba(255, 255, 255, 0.2);
}
.mobile-nav__sub a:hover { color: var(--cyan-300); border-color: var(--cyan-400); }
.mobile-nav__foot { margin-top: 20px; display: grid; gap: 12px; }
.mobile-nav__tel { text-align: center; font-size: var(--fs-sm); color: rgba(226, 238, 255, 0.7); }
.mobile-nav__tel strong { display: block; font-size: 1.25rem; color: var(--cyan-300); }

/* ==========================================================================
   Hero（深色 + 粒子网络 + 云控制台）
   ========================================================================== */
.hero {
  position: relative;
  color: #fff;
  background: #0A1A2F;
  background:
    linear-gradient(160deg, rgba(10, 26, 47, 0.72) 0%, rgba(20, 48, 79, 0.52) 55%, rgba(18, 184, 196, 0.2) 100%),
    var(--navy-900);
  overflow: hidden;
  isolation: isolate;
}
.hero__canvas {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: -1;
  width: 100%; height: 100%;
  pointer-events: none;
}
.hero__bg {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: -2;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.5;
}
.hero::after {
  content: "";
  position: absolute;
  right: -180px; top: -180px;
  width: 480px; height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 217, 224, 0.25), transparent 65%);
  pointer-events: none;
}
.hero__inner {
  display: grid;
  gap: 32px;
  padding-block: clamp(3.25rem, 2rem + 6vw, 5.5rem);
  align-items: center;
}
@media (min-width: 1024px) {
  .hero__inner { grid-template-columns: 1.12fr 0.88fr; gap: 48px; }
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid rgba(98, 228, 234, 0.4);
  border-radius: 999px;
  background: rgba(47, 217, 224, 0.12);
  color: #62E4EA;
  color: var(--cyan-300);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
}
.hero__title {
  margin-top: 18px;
  font-size: var(--fs-hero);
  font-weight: 900;
  line-height: 1.25;
  color: #fff;
  letter-spacing: -0.01em;
}
.hero__title .grad { color: #62E4EA; color: var(--cyan-300); }
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .hero__title .grad {
    background: linear-gradient(90deg, var(--cyan-300), var(--cyan-400));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}
.hero__desc {
  margin-top: 16px;
  max-width: 560px;
  color: rgba(226, 238, 255, 0.92);
  font-size: var(--fs-sm);
}
.hero .btn-row { margin-top: 28px; }
.hero__note { margin-top: 14px; font-size: var(--fs-xs); color: rgba(226, 238, 255, 0.7); }

/* ---------- 云控制台卡片 ---------- */
.console {
  border-radius: var(--radius-lg);
  background: #0B1E33;
  background: rgba(9, 22, 40, 0.82);
  border: 1px solid rgba(98, 228, 234, 0.22);
  box-shadow: 0 24px 60px rgba(3, 10, 20, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.04) inset;
  overflow: hidden;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.console__bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.console__dots { display: inline-flex; gap: 6px; }
.console__dots i {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
}
.console__dots i:first-child { background: #FF5F57; }
.console__dots i:nth-child(2) { background: #FEBC2E; }
.console__dots i:nth-child(3) { background: #28C840; }
.console__title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(226, 238, 255, 0.75);
  letter-spacing: 0.02em;
}
.console__live {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: #4ADE80;
}
.pulse {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #4ADE80;
  box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.55); }
  70% { box-shadow: 0 0 0 9px rgba(74, 222, 128, 0); }
  100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}
.console__body { padding: 18px 16px 14px; display: grid; gap: 16px; }
.console__row { display: grid; gap: 6px; }
.console__label { font-size: 0.8125rem; font-weight: 700; color: rgba(226, 238, 255, 0.9); }
.console__val { font-size: 0.75rem; color: rgba(226, 238, 255, 0.6); font-family: var(--font-mono); }
.meter {
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
}
.meter > span {
  display: block;
  height: 100%;
  width: 60%;
  border-radius: inherit;
  background: #1E6FEB;
  background: linear-gradient(90deg, var(--blue-600), var(--cyan-400));
  box-shadow: 0 0 12px rgba(47, 217, 224, 0.5);
}
.meter--cyan > span { background: linear-gradient(90deg, var(--cyan-500), var(--cyan-300)); }
.console__foot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  padding-top: 12px;
  border-top: 1px dashed rgba(255, 255, 255, 0.14);
  font-size: 0.75rem;
  color: rgba(226, 238, 255, 0.75);
}
.console__foot span { display: inline-flex; align-items: center; gap: 6px; }
.console__foot svg { width: 15px; height: 15px; color: var(--cyan-300); }

/* 信任条 */
.trustbar { background: #0A1A2F; background: var(--navy-900); color: #fff; }
.trustbar__inner {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px 12px;
  padding-block: 26px;
}
@media (min-width: 768px) { .trustbar__inner { grid-template-columns: repeat(4, 1fr); } }
.trustbar__item { text-align: center; }
.trustbar__num {
  font-size: clamp(1.5rem, 1.2rem + 1.6vw, 2rem);
  font-weight: 900;
  color: #62E4EA;
  color: var(--cyan-300);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}
.trustbar__num small { font-size: 0.6em; font-weight: 700; }
.trustbar__label { font-size: var(--fs-xs); color: rgba(226, 238, 255, 0.78); margin-top: 2px; }

/* ==========================================================================
   卡片体系
   ========================================================================== */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: auto;
  height: 3px;
  background: linear-gradient(90deg, var(--blue-600), var(--cyan-400));
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--line); }
.card:hover::before { opacity: 1; }
.card__body { padding: 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px; height: 48px;
  border-radius: 12px;
  background: #EAF2FE;
  background: linear-gradient(135deg, var(--blue-050), var(--cyan-050));
  color: var(--blue-600);
}
.card__icon svg { width: 26px; height: 26px; }
.card__title { font-size: var(--fs-h3); }
.card__title a { color: inherit; text-decoration: none !important; }
.card__title a:hover { color: var(--blue-600); }
.card__text { font-size: var(--fs-sm); color: var(--gray); }
.card__meta { margin-top: auto; padding-top: 6px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--blue-600);
  text-decoration: none !important;
}
.card__link svg { width: 16px; height: 16px; transition: transform var(--dur) var(--ease); }
.card__link:hover svg { transform: translateX(3px); }

/* 技术实力卡（紧凑） */
.tech-card .card__body { padding: 20px; gap: 8px; }
.tech-card .card__icon { width: 42px; height: 42px; border-radius: 11px; }
.tech-card .card__icon svg { width: 22px; height: 22px; }
.tech-card .card__title { font-size: 1rem; }

/* 服务大卡（栏目矩阵） */
.svc {
  position: relative;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  overflow: hidden;
}
.svc::after {
  content: "";
  position: absolute;
  right: -40px; top: -40px;
  width: 130px; height: 130px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 217, 224, 0.16), transparent 70%);
  pointer-events: none;
}
.svc:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.svc__head { display: flex; align-items: center; gap: 14px; }
.svc__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px; height: 52px;
  border-radius: 14px;
  background: #14304F;
  background: linear-gradient(135deg, var(--navy-800), var(--navy-900));
  color: var(--cyan-300);
  flex-shrink: 0;
}
.svc__icon svg { width: 28px; height: 28px; }
.svc__title { font-size: var(--fs-h3); }
.svc__tag { font-size: var(--fs-xs); color: var(--cyan-500); font-weight: 700; }
.svc__list { margin-top: 16px; display: grid; gap: 8px; }
.svc__list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  min-height: 44px;
  padding: 10px 14px;
  background: var(--bg-soft);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--ink-80);
  text-decoration: none !important;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.svc__list a:hover { background: var(--blue-050); color: var(--blue-700); }
.svc__list a svg { width: 16px; height: 16px; color: var(--gray-light); flex-shrink: 0; }
.svc__list a:hover svg { color: var(--blue-600); }

/* ---------- 深色区块（云网格底纹） ---------- */
.block-dark {
  position: relative;
  background: #0A1A2F;
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(47, 217, 224, 0.14), transparent 60%),
    linear-gradient(180deg, var(--navy-900), var(--navy-800));
  color: #fff;
}
.block-dark::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(1200px 500px at 50% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(1200px 500px at 50% 0%, #000 30%, transparent 75%);
  pointer-events: none;
}
.block-dark h2, .block-dark h3 { color: #fff; }
.block-dark .section-desc { color: rgba(226, 238, 255, 0.75); }

/* ---------- 信任墙 ---------- */
.trust-wall { display: grid; gap: 16px; }
@media (min-width: 768px) { .trust-wall { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .trust-wall { grid-template-columns: repeat(3, 1fr); } }

.trust-item {
  display: flex;
  gap: 14px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
}
.trust-item svg { width: 26px; height: 26px; color: var(--cyan-300); flex-shrink: 0; }
.trust-item h3 { font-size: 1rem; margin-bottom: 4px; }
.trust-item p { font-size: var(--fs-sm); color: rgba(226, 238, 255, 0.78); line-height: 1.7; }

/* 资质徽章 */
.badges { display: flex; flex-wrap: wrap; gap: 12px; }
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--navy-900);
  box-shadow: var(--shadow-sm);
}
.badge svg { width: 18px; height: 18px; color: var(--blue-600); }
.badge--cyan { border-color: var(--cyan-400); background: var(--cyan-050); }

/* ---------- 客户口碑 ---------- */
.voice {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 26px 24px 22px;
  background: #fff;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.voice:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.voice::before {
  content: "\201C";
  display: block;
  font-size: 3.2rem;
  line-height: 0.6;
  font-weight: 900;
  color: #1E6FEB;
}
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .voice::before {
    background: linear-gradient(135deg, var(--blue-600), var(--cyan-400));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}
.voice blockquote {
  font-size: var(--fs-sm);
  color: var(--ink-80);
  line-height: 1.85;
  flex: 1;
}
.voice figcaption { display: grid; gap: 2px; padding-top: 12px; border-top: 1px dashed var(--line); }
.voice__tag { font-size: var(--fs-xs); font-weight: 700; color: var(--cyan-500); }
.voice__from { font-size: var(--fs-xs); color: var(--gray); }

/* ---------- 服务承诺 / 客户收益卡 ---------- */
.outcome-card .card__body { gap: 8px; }

/* ---------- 统计面板 ---------- */
.stat-panel {
  background: #14304F;
  background: linear-gradient(160deg, var(--navy-900), var(--navy-800));
  border-color: transparent;
  color: #fff;
}
.stat-panel .card__title { color: #fff; }
.stat-panel .stat { background: rgba(255, 255, 255, 0.06); border-color: rgba(255, 255, 255, 0.12); box-shadow: none; }
.stat-panel .stat__num { color: var(--cyan-300); }
.stat-panel .stat__label { color: rgba(226, 238, 255, 0.72); }

/* ---------- 解决方案卡 ---------- */
.sol-card { position: relative; overflow: hidden; }
.sol-card__body { padding: 26px; }
.sol-card__num {
  font-size: 2.5rem;
  font-weight: 900;
  line-height: 1;
  color: #1E6FEB;
  opacity: 0.9;
}
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .sol-card__num {
    background: linear-gradient(135deg, var(--blue-600), var(--cyan-400));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }
}
.sol-card__title { font-size: var(--fs-h3); margin: 10px 0 8px; }
.sol-card__text { font-size: var(--fs-sm); color: var(--gray); }
.sol-card__points { margin-top: 14px; display: grid; gap: 6px; }
.sol-card__points li {
  display: flex;
  gap: 8px;
  font-size: var(--fs-sm);
  color: var(--ink-80);
}
.sol-card__points li::before { content: "◆"; color: var(--cyan-500); font-size: 0.7em; line-height: 2.2; }

/* ---------- 价格表 ---------- */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  background: #fff;
  -webkit-overflow-scrolling: touch;
}
.table { min-width: 640px; font-size: var(--fs-sm); }
.table caption {
  padding: 14px 18px;
  text-align: left;
  font-weight: 700;
  color: var(--navy-900);
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line-soft);
}
.table th, .table td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
.table thead th {
  background: #0A1A2F;
  background: var(--navy-900);
  color: #fff;
  font-weight: 700;
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.table tbody tr:nth-child(even) { background: rgba(245, 248, 252, 0.6); }
.table tbody tr:hover { background: var(--blue-050); }
.table tbody tr:last-child td { border-bottom: 0; }
.table .price {
  font-weight: 900;
  color: var(--blue-700);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  font-family: var(--font-mono);
  font-size: 0.9em;
}
.table .plan { font-weight: 700; color: var(--navy-900); white-space: nowrap; }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 12px; max-width: 820px; }
.faq__item {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.faq__item[open] { border-color: var(--cyan-400); box-shadow: var(--shadow-md); }
.faq__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--navy-900);
  cursor: pointer;
  list-style: none;
  min-height: 44px;
}
.faq__q::-webkit-details-marker { display: none; }
.faq__q .chev {
  width: 22px; height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--blue-050);
  color: var(--blue-600);
  flex-shrink: 0;
  transition: transform var(--dur) var(--ease);
}
.faq__item[open] .faq__q .chev { transform: rotate(180deg); }
.faq__a { padding: 0 18px 18px; font-size: var(--fs-sm); color: var(--gray); }

/* ---------- 流程步骤 ---------- */
.steps { display: grid; gap: 16px; counter-reset: step; }
@media (min-width: 768px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .steps { grid-template-columns: repeat(4, 1fr); } }
.step {
  position: relative;
  padding: 22px 20px 20px;
  background: #fff;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 12px;
  background: #1E6FEB;
  background: linear-gradient(135deg, var(--blue-600), var(--cyan-500));
  color: #fff;
  font-weight: 900;
  margin-bottom: 12px;
}
.step h3 { font-size: 1rem; margin-bottom: 6px; }
.step p { font-size: var(--fs-sm); color: var(--gray); }

/* ---------- 页面 Hero（内页） ---------- */
.page-hero {
  position: relative;
  padding-block: clamp(2.5rem, 1.5rem + 4.5vw, 4rem);
  color: #fff;
  background: #0A1A2F;
  background:
    radial-gradient(900px 420px at 85% -20%, rgba(47, 217, 224, 0.2), transparent 60%),
    linear-gradient(150deg, var(--navy-900), var(--navy-800) 70%, var(--navy-700));
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 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: 56px 56px;
  mask-image: radial-gradient(900px 420px at 85% -20%, #000 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(900px 420px at 85% -20%, #000 20%, transparent 70%);
  pointer-events: none;
}
.page-hero__inner { display: grid; gap: 22px; align-items: center; position: relative; }
@media (min-width: 1024px) { .page-hero__inner { grid-template-columns: 1.2fr 0.8fr; gap: 44px; } }
.page-hero h1 { color: #fff; font-size: clamp(1.7rem, 1.2rem + 2.2vw, 2.4rem); font-weight: 900; }
.page-hero__desc { margin-top: 14px; color: rgba(226, 238, 255, 0.88); font-size: var(--fs-sm); max-width: 620px; }
.page-hero__points { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 10px 22px; }
.page-hero__points li { display: inline-flex; align-items: center; gap: 8px; font-size: var(--fs-sm); color: rgba(226, 238, 255, 0.92); }
.page-hero__points svg { width: 18px; height: 18px; color: var(--cyan-300); flex-shrink: 0; }
.page-hero__figure { display: none; }
@media (min-width: 1024px) { .page-hero__figure { display: block; } }
.page-hero__figure img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }

/* 面包屑 */
.crumbs { padding-block: 14px 0; font-size: var(--fs-xs); color: var(--gray); }
.crumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.crumbs li { display: inline-flex; align-items: center; gap: 6px; }
.crumbs li + li::before { content: "/"; color: var(--gray-light); }
.crumbs a { color: var(--gray); text-decoration: none !important; }
.crumbs a:hover { color: var(--blue-600); }
.crumbs [aria-current="page"] { color: var(--ink-80); font-weight: 700; }

/* ---------- CTA 横幅 ---------- */
.cta-band {
  position: relative;
  color: #fff;
  background: #1858C4;
  background:
    radial-gradient(700px 300px at 15% 120%, rgba(47, 217, 224, 0.24), transparent 60%),
    linear-gradient(120deg, var(--blue-700), var(--navy-900) 75%);
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 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: 56px 56px;
  mask-image: radial-gradient(700px 300px at 15% 120%, #000 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(700px 300px at 15% 120%, #000 20%, transparent 70%);
  pointer-events: none;
}
.cta-band__inner {
  position: relative;
  display: grid;
  gap: 20px;
  padding-block: clamp(2.25rem, 1.5rem + 3.5vw, 3.5rem);
  align-items: center;
}
@media (min-width: 768px) { .cta-band__inner { grid-template-columns: 1fr auto; gap: 36px; } }
.cta-band h2 { color: #fff; font-size: var(--fs-h2); }
.cta-band p { margin-top: 8px; color: rgba(226, 238, 255, 0.85); font-size: var(--fs-sm); }
.cta-band .btn-row { margin-top: 0; }

/* ---------- 页脚 ---------- */
.site-footer { background: #0A1A2F; background: var(--navy-900); color: rgba(226, 238, 255, 0.78); font-size: var(--fs-sm); }
.site-footer a { color: rgba(226, 238, 255, 0.78); text-decoration: none !important; }
.site-footer a:hover { color: var(--cyan-300); }
.footer-grid {
  display: grid;
  gap: 28px;
  padding-block: clamp(2.25rem, 1.5rem + 3vw, 3.25rem);
}
@media (min-width: 768px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1.2fr; } }
.footer-brand p { margin-top: 14px; line-height: 1.8; max-width: 320px; }
.footer-col h3 { color: #fff; font-size: 1rem; margin-bottom: 14px; }
.footer-col ul { display: grid; gap: 8px; }
.footer-col a { display: inline-flex; align-items: center; min-height: 32px; }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 10px; line-height: 1.7; }
.footer-contact svg { width: 18px; height: 18px; color: var(--cyan-300); flex-shrink: 0; margin-top: 4px; }
.footer-contact strong { color: #fff; font-size: 1.05rem; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-block: 18px;
  display: grid;
  gap: 8px;
  font-size: var(--fs-xs);
  color: rgba(226, 238, 255, 0.6);
}
@media (min-width: 768px) { .footer-bottom { grid-template-columns: 1fr auto; align-items: center; } }
.footer-bottom a { color: rgba(226, 238, 255, 0.75); }

/* ---------- 联系表单 ---------- */
.form-card {
  background: #fff;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: clamp(20px, 1rem + 2vw, 32px);
}
.form-grid { display: grid; gap: 16px; }
@media (min-width: 640px) { .form-grid--2 { grid-template-columns: 1fr 1fr; } }
.field { display: grid; gap: 6px; }
.field label { font-size: var(--fs-sm); font-weight: 700; color: var(--ink-80); }
.field label .req { color: var(--red); }
.field input, .field select, .field textarea {
  width: 100%;
  min-height: 46px;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  font-size: var(--fs-sm);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--blue-600);
  box-shadow: var(--ring);
}
.field .hint { font-size: var(--fs-xs); color: var(--gray-light); }
.form-note { font-size: var(--fs-xs); color: var(--gray); margin-top: 4px; }

/* ---------- 滚动揭示动画 ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }

/* ---------- 浮动客服 ---------- */
.float-cta {
  position: fixed;
  right: 16px;
  bottom: 18px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.float-cta__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 18px;
  border-radius: 999px;
  font-size: var(--fs-sm);
  font-weight: 700;
  color: #fff;
  text-decoration: none !important;
  box-shadow: var(--shadow-lg);
  transition: transform var(--dur) var(--ease);
}
.float-cta__btn:hover { transform: translateY(-2px); }
.float-cta__btn svg { width: 20px; height: 20px; flex-shrink: 0; }
.float-cta__btn--tel { background: #1E6FEB; background: linear-gradient(135deg, var(--blue-600), var(--blue-700)); }
.float-cta__btn--top { background: #0A1A2F; background: var(--navy-900); min-width: 48px; justify-content: center; padding: 12px; }
.float-cta__btn--top svg { width: 18px; height: 18px; }

/* 移动端：仅保留电话浮动按钮，避免遮挡内容 */
@media (max-width: 767px) {
  body { padding-bottom: 76px; }
  .float-cta__btn--top { display: none; }
}

/* ---------- 文章/资讯 ---------- */
.article-card__meta { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: var(--fs-xs); color: var(--gray-light); }
.article-body { max-width: 760px; }
.article-body h2 { font-size: var(--fs-h3); margin: 28px 0 10px; }
.article-body h3 { font-size: 1rem; margin: 22px 0 8px; }
.article-body p { margin-bottom: 14px; color: var(--ink-80); }
.article-body ul { margin: 0 0 14px; display: grid; gap: 6px; }
.article-body ul li { position: relative; padding-left: 20px; color: var(--ink-80); }
.article-body ul li::before { content: ""; position: absolute; left: 2px; top: 0.65em; width: 7px; height: 7px; border-radius: 2px; background: var(--cyan-400); }
.article-body blockquote {
  margin: 18px 0;
  padding: 14px 18px;
  border-left: 3px solid var(--cyan-400);
  background: var(--bg-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--ink-80);
  font-size: var(--fs-sm);
}

/* ---------- 数据统计行 ---------- */
.stat-row { display: grid; gap: 16px; }
@media (min-width: 640px) { .stat-row { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .stat-row { grid-template-columns: repeat(4, 1fr); } }
.stat {
  padding: 20px;
  background: #fff;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.stat__num { font-size: clamp(1.6rem, 1.3rem + 1.2vw, 2.1rem); font-weight: 900; color: var(--blue-700); font-variant-numeric: tabular-nums; line-height: 1.2; }
.stat__num small { font-size: 0.55em; }
.stat__label { font-size: var(--fs-xs); color: var(--gray); margin-top: 4px; }

/* ---------- 对比 / 检查列表 ---------- */
.check-list { display: grid; gap: 10px; }
.check-list li { display: flex; gap: 10px; align-items: flex-start; font-size: var(--fs-sm); color: var(--ink-80); }
.check-list svg { width: 20px; height: 20px; color: var(--green); flex-shrink: 0; margin-top: 2px; }

/* ==========================================================================
   PC / 宽屏精细化适配（≥1200 / ≥1440 / ≥1600）
   ========================================================================== */
@media (min-width: 1200px) {
  .grid { gap: 24px; }
  .section { padding-block: clamp(3.25rem, 1.5rem + 5vw, 5.25rem); }
  .hero__inner { padding-block: clamp(4rem, 2rem + 6vw, 6rem); }
  .main-nav__link { padding: 8px 12px; font-size: 0.9375rem; }
  .brand__logo { width: 158px; }
}

@media (min-width: 1440px) {
  :root { --container: 1280px; --header-h: 68px; }
  .section-title { letter-spacing: -0.01em; }
  .card__body { padding: 26px; }
  .svc { padding: 28px; }
  .console__body { padding: 22px 20px 16px; gap: 18px; }
  .trustbar__inner { padding-block: 30px; }
  .footer-grid { gap: 36px; }
}

@media (min-width: 1600px) {
  :root { --container: 1360px; }
  .grid { gap: 28px; }
  .hero__inner { gap: 64px; }
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .pulse { animation: none; }
}

/* ---------- 打印 ---------- */
@media print {
  .site-header, .mobile-nav, .float-cta, .cta-band, .nav-toggle, .hero__canvas { display: none !important; }
  body { color: #000; }
}