/* ==========================================================================
   RYCGE 企业主页 · 样式表
   设计基调：深蓝科技感 + 青色高光，克制留白，强调四端入口分流
   ========================================================================== */

/* ---------- 设计令牌 ---------- */
:root {
  --navy-900: #071226;
  --navy-800: #0b1b3a;
  --navy-700: #112a56;
  --navy-600: #1b3b70;
  --cyan-500: #19c6d6;
  --cyan-400: #3fd9e6;
  --blue-500: #2f6bff;
  --violet-500: #7a5cff;
  --amber-500: #ffb020;

  --ink-900: #0d1526;
  --ink-700: #30405c;
  --ink-500: #5b6b86;
  --ink-300: #93a1b8;

  --line: #e3e9f2;
  --surface: #ffffff;
  --surface-alt: #f4f7fc;
  --surface-deep: #eef3fa;

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;

  --shadow-sm: 0 2px 8px rgba(11, 27, 58, .06);
  --shadow: 0 10px 30px rgba(11, 27, 58, .09);
  --shadow-lg: 0 24px 60px rgba(11, 27, 58, .16);

  --container: 1200px;
  --header-h: 72px;

  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
          -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-700);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { color: var(--ink-900); line-height: 1.3; margin: 0 0 .6em; font-weight: 700; }
h1 { font-size: clamp(2rem, 1.2rem + 2.6vw, 3.25rem); letter-spacing: -.5px; }
h2 { font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2.25rem); letter-spacing: -.3px; }
h3 { font-size: 1.125rem; }
p { margin: 0 0 1em; }
ul, ol, dl, dd { margin: 0; padding: 0; }
li { list-style: none; }
img, svg { max-width: 100%; }
a { color: var(--blue-500); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--cyan-500); }

:focus-visible {
  outline: 3px solid var(--cyan-500);
  outline-offset: 3px;
  border-radius: 4px;
}

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

.skip-link {
  position: absolute; top: -60px; left: 16px; z-index: 200;
  padding: 10px 18px; border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: var(--navy-800); color: #fff; font-weight: 600;
  transition: top .25s var(--ease);
}
.skip-link:focus { top: 0; color: #fff; }

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

/* ---------- 通用组件 ---------- */
.eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--cyan-500);
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: inherit; font-size: .9375rem; font-weight: 600;
  cursor: pointer; white-space: nowrap;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease),
              background-color .2s var(--ease), color .2s var(--ease),
              border-color .2s var(--ease);
}
.btn-lg { padding: 14px 32px; font-size: 1rem; }
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: linear-gradient(135deg, var(--blue-500), var(--cyan-500));
  color: #fff;
  box-shadow: 0 8px 22px rgba(47, 107, 255, .3);
}
.btn-primary:hover {
  color: #fff; transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(47, 107, 255, .38);
}

.btn-outline {
  border-color: rgba(255, 255, 255, .45);
  color: #fff;
  background: rgba(255, 255, 255, .06);
  backdrop-filter: blur(4px);
}
.btn-outline:hover {
  color: var(--navy-800); background: #fff; border-color: #fff;
  transform: translateY(-2px);
}

.btn-ghost { color: var(--ink-700); border-color: var(--line); background: #fff; }
.btn-ghost:hover { color: var(--blue-500); border-color: var(--blue-500); }

.section { padding: clamp(64px, 7vw, 108px) 0; }
.section-alt { background: var(--surface-alt); }
.section-dark { background: var(--navy-900); color: rgba(255, 255, 255, .78); }
.section-dark h2, .section-dark h3 { color: #fff; }

.section-head { max-width: 720px; margin: 0 auto clamp(40px, 5vw, 64px); text-align: center; }
.section-head.align-left { margin-left: 0; text-align: left; }
.section-desc { font-size: 1.0625rem; color: var(--ink-500); margin: 0; }
.section-dark .section-desc { color: rgba(255, 255, 255, .62); }

.cards { display: grid; gap: 24px; }
.cards-2 { grid-template-columns: repeat(2, 1fr); }
.cards-3 { grid-template-columns: repeat(3, 1fr); }
.cards-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  padding: 30px 26px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease),
              border-color .3s var(--ease);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(25, 198, 214, .45);
}

.card-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 52px; height: 52px; margin-bottom: 18px;
  border-radius: 14px;
  color: var(--blue-500);
  background: linear-gradient(135deg, rgba(47, 107, 255, .12), rgba(25, 198, 214, .14));
}

.tick li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 8px;
  font-size: .9375rem;
  color: var(--ink-500);
}
.tick li::before {
  content: "";
  position: absolute; left: 4px; top: .62em;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--cyan-500);
  box-shadow: 0 0 0 3px rgba(25, 198, 214, .18);
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .86);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.site-header.is-stuck { border-bottom-color: var(--line); box-shadow: var(--shadow-sm); }

.header-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  min-height: var(--header-h);
}

.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--navy-800); }
.brand:hover { color: var(--navy-800); }
.brand-mark { display: inline-flex; color: var(--cyan-500); }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 1.125rem; letter-spacing: .5px; }
.brand-text small { font-size: .625rem; letter-spacing: 2.4px; color: var(--ink-300); }

.site-nav { display: flex; align-items: center; gap: 28px; margin-left: auto; }
.site-nav ul { display: flex; gap: 26px; }
.site-nav ul a {
  position: relative;
  font-size: .9375rem; font-weight: 500;
  color: var(--ink-700);
}
.site-nav ul a::after {
  content: "";
  position: absolute; left: 0; bottom: -6px;
  width: 100%; height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--blue-500), var(--cyan-500));
  transform: scaleX(0); transform-origin: left;
  transition: transform .25s var(--ease);
}
.site-nav ul a:hover::after,
.site-nav ul a.is-active::after { transform: scaleX(1); }
.site-nav ul a.is-active { color: var(--navy-800); font-weight: 600; }

.nav-cta { display: flex; gap: 10px; }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--line); border-radius: 10px;
  background: #fff; cursor: pointer;
  position: relative;
}
.nav-toggle .bar,
.nav-toggle .bar::before,
.nav-toggle .bar::after {
  position: absolute; left: 50%; width: 18px; height: 2px;
  margin-left: -9px; border-radius: 2px;
  background: var(--navy-800);
  transition: transform .25s var(--ease), opacity .2s var(--ease);
}
.nav-toggle .bar { top: 50%; margin-top: -1px; }
.nav-toggle .bar::before { content: ""; margin-left: -9px; transform: translateY(-6px); }
.nav-toggle .bar::after { content: ""; margin-left: -9px; transform: translateY(6px); }
.nav-toggle[aria-expanded="true"] .bar { background: transparent; }
.nav-toggle[aria-expanded="true"] .bar::before { transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .bar::after { transform: rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(64px, 7vw, 104px) 0 clamp(72px, 8vw, 120px);
  background: var(--navy-800);
  color: rgba(255, 255, 255, .8);
  isolation: isolate;
}
.hero-bg {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(1000px 520px at 12% -10%, rgba(47, 107, 255, .45), transparent 65%),
    radial-gradient(760px 460px at 88% 12%, rgba(25, 198, 214, .32), transparent 62%),
    radial-gradient(620px 400px at 60% 110%, rgba(122, 92, 255, .26), transparent 60%),
    linear-gradient(170deg, var(--navy-800), var(--navy-900));
}
.hero-bg::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 50% 30%, #000 10%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 10%, transparent 72%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}
.hero h1 { color: #fff; margin-bottom: 20px; }
.hero h1 .hl {
  background: linear-gradient(100deg, var(--cyan-400), #9fe9ff);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  padding: 0 .12em;
}
.hero .lead {
  max-width: 54ch;
  font-size: 1.0625rem;
  color: rgba(255, 255, 255, .72);
  margin-bottom: 32px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 44px; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 28px;
  justify-content: start;
  padding-top: 26px;
  border-top: 1px solid rgba(255, 255, 255, .14);
}
.hero-stats dt {
  font-size: 1.5rem; font-weight: 700; color: #fff;
  letter-spacing: -.5px; line-height: 1.2;
}
.hero-stats dd { font-size: .8125rem; color: rgba(255, 255, 255, .55); }

/* Hero 入口面板 */
.hero-panel {
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  box-shadow: 0 30px 70px rgba(0, 0, 0, .3);
  overflow: hidden;
}
.panel-head {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 20px;
  font-size: .8125rem; letter-spacing: 1px;
  color: rgba(255, 255, 255, .62);
  border-bottom: 1px solid rgba(255, 255, 255, .12);
  background: rgba(255, 255, 255, .04);
}
.dot-group { display: inline-flex; gap: 6px; }
.dot-group i { width: 9px; height: 9px; border-radius: 50%; background: rgba(255, 255, 255, .28); }
.dot-group i:first-child { background: #ff6058; }
.dot-group i:nth-child(2) { background: var(--amber-500); }
.dot-group i:last-child { background: #28c840; }

.panel-list { padding: 10px; }
.panel-list a {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 14px;
  border-radius: var(--radius);
  color: #fff;
  transition: background-color .22s var(--ease), transform .22s var(--ease);
}
.panel-list a:hover { background: rgba(255, 255, 255, .1); transform: translateX(4px); color: #fff; }

.tag {
  flex: 0 0 auto;
  min-width: 48px; padding: 5px 0;
  border-radius: 8px;
  font-size: .6875rem; font-weight: 700; letter-spacing: .8px;
  text-align: center; color: #fff;
}
.tag-mch   { background: linear-gradient(135deg, #2f6bff, #19c6d6); }
.tag-agent { background: linear-gradient(135deg, #7a5cff, #2f6bff); }
.tag-app   { background: linear-gradient(135deg, #15b57f, #19c6d6); }
.tag-mgr   { background: linear-gradient(135deg, #ff8a3d, #ffb020); }

.panel-name { display: flex; flex-direction: column; font-size: .9375rem; font-weight: 600; line-height: 1.4; }
.panel-name em {
  font-style: normal; font-size: .75rem; font-weight: 400;
  color: rgba(255, 255, 255, .5);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.panel-list .arrow { margin-left: auto; color: var(--cyan-400); font-size: 1.125rem; }

.panel-foot {
  margin: 0;
  padding: 12px 20px 16px;
  font-size: .75rem;
  color: rgba(255, 255, 255, .42);
  border-top: 1px solid rgba(255, 255, 255, .1);
}

/* ---------- 平台卡片 ---------- */
.card-platform { display: flex; flex-direction: column; }
.card-domain {
  margin: -.4em 0 .9em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .8125rem;
  color: var(--cyan-500);
  word-break: break-all;
}
.card-text { font-size: .9375rem; color: var(--ink-500); }
.card-platform .tick { margin-bottom: 20px; }
.card-link { margin-top: auto; font-size: .9375rem; font-weight: 600; }

.card-internal { background: linear-gradient(180deg, #fffdf7, #fff); border-color: rgba(255, 176, 32, .4); }
.card-internal .card-icon { color: #e08a00; background: linear-gradient(135deg, rgba(255, 176, 32, .18), rgba(255, 138, 61, .14)); }
.card-internal .card-domain { color: #d98500; }
.card-internal .tick li::before { background: var(--amber-500); box-shadow: 0 0 0 3px rgba(255, 176, 32, .18); }
.card-internal .card-link { color: #d98500; }
.card-internal:hover { border-color: rgba(255, 176, 32, .75); }

.badge-internal {
  display: inline-block;
  margin-bottom: 10px; padding: 3px 10px;
  border-radius: 999px;
  font-size: .6875rem; font-weight: 700; letter-spacing: .5px;
  color: #a35c00; background: rgba(255, 176, 32, .18);
}

/* ---------- 行业方案 ---------- */
.solution-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.solution {
  position: relative;
  padding: 32px 30px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--surface-alt), #fff 65%);
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.solution::before {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--blue-500), var(--cyan-500));
  transform: scaleY(0); transform-origin: top;
  transition: transform .35s var(--ease);
}
.solution:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(47, 107, 255, .3); }
.solution:hover::before { transform: scaleY(1); }
.solution-no {
  display: block; margin-bottom: 10px;
  font-size: 1.75rem; font-weight: 800; line-height: 1;
  color: rgba(47, 107, 255, .22);
  letter-spacing: -1px;
}
.solution p { margin: 0; font-size: .9375rem; color: var(--ink-500); }

/* ---------- 技术架构（深色区） ---------- */
.arch {
  display: flex; flex-direction: column; align-items: stretch;
  gap: 0;
  padding: clamp(22px, 3vw, 36px);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .035);
}
.arch-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.arch-node {
  display: flex; flex-direction: column; gap: 4px;
  padding: 16px 18px;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .06);
  text-align: center;
  transition: background-color .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease);
}
.arch-node:hover {
  background: rgba(25, 198, 214, .14);
  border-color: rgba(25, 198, 214, .5);
  transform: translateY(-3px);
}
.arch-node strong {
  color: #fff; font-size: .9375rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.arch-node span { font-size: .75rem; color: rgba(255, 255, 255, .55); }
.arch-node-wide { grid-column: 1 / -1; }

.arch-clients .arch-node { border-color: rgba(47, 107, 255, .45); background: rgba(47, 107, 255, .14); }
.arch-gateway .arch-node { border-color: rgba(25, 198, 214, .4); background: rgba(25, 198, 214, .1); }
.arch-data .arch-node { border-color: rgba(122, 92, 255, .42); background: rgba(122, 92, 255, .12); }

.arch-arrow {
  position: relative;
  height: 30px;
  margin: 4px 0;
}
.arch-arrow::before {
  content: "";
  position: absolute; left: 50%; top: 0; bottom: 6px;
  width: 1px; margin-left: -.5px;
  background: linear-gradient(180deg, rgba(255, 255, 255, .1), rgba(25, 198, 214, .6));
}
.arch-arrow::after {
  content: "";
  position: absolute; left: 50%; bottom: 0;
  margin-left: -4px;
  border: 4px solid transparent;
  border-top-color: rgba(25, 198, 214, .75);
}

.arch-tags {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-top: 28px; justify-content: center;
}
.arch-tags li {
  padding: 7px 16px;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 999px;
  font-size: .8125rem;
  color: rgba(255, 255, 255, .72);
  background: rgba(255, 255, 255, .04);
}

/* ---------- 关于我们 ---------- */
.about-inner {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}
.about-copy p { color: var(--ink-500); }
.about-points { display: grid; gap: 16px; margin-top: 28px; }
.about-points > div {
  display: flex; flex-direction: column;
  padding-left: 16px;
  border-left: 3px solid rgba(25, 198, 214, .5);
}
.about-points strong { color: var(--ink-900); font-size: .9375rem; }
.about-points span { font-size: .875rem; color: var(--ink-500); }

.about-card {
  padding: 34px 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--navy-800), var(--navy-700) 60%, var(--navy-600));
  box-shadow: var(--shadow-lg);
  color: #fff;
}
.about-card-label {
  display: block; margin-bottom: 20px;
  font-size: .75rem; letter-spacing: 2px; text-transform: uppercase;
  color: var(--cyan-400);
}
.about-metric {
  display: flex; align-items: baseline; justify-content: space-between; gap: 16px;
  padding: 14px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, .16);
}
.about-metric:last-child { border-bottom: 0; padding-bottom: 0; }
.about-metric b { font-size: 1.625rem; font-weight: 700; letter-spacing: -.5px; }
.about-metric i { font-style: normal; font-size: .8125rem; color: rgba(255, 255, 255, .6); }

/* ---------- 联系我们 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 24px;
  align-items: start;
}
.contact-form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  padding: clamp(24px, 3vw, 36px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.field { display: flex; flex-direction: column; gap: 7px; }
.field-full { grid-column: 1 / -1; }
.field label { font-size: .875rem; font-weight: 600; color: var(--ink-900); }
.field label span { color: #e5484d; }

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 11px 14px;
  font-family: inherit; font-size: .9375rem; color: var(--ink-900);
  background: var(--surface-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease), background-color .2s var(--ease);
}
.field textarea { resize: vertical; min-height: 104px; }
.field input::placeholder, .field textarea::placeholder { color: var(--ink-300); }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  background: #fff;
  border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(47, 107, 255, .14);
}
.field input[aria-invalid="true"] { border-color: #e5484d; background: #fff6f6; }
.err { margin: 0; min-height: 1.2em; font-size: .8125rem; color: #e5484d; }

.form-actions { flex-direction: row; align-items: center; gap: 16px; flex-wrap: wrap; }
.form-note { margin: 0; font-size: .875rem; color: var(--ink-500); }
.form-note.is-ok { color: #12916a; font-weight: 600; }
.form-note.is-error { color: #e5484d; font-weight: 600; }

.contact-info {
  padding: clamp(24px, 3vw, 32px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.info-list { margin-bottom: 24px; }
.info-list li {
  display: flex; flex-direction: column; gap: 2px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.info-list li:last-child { border-bottom: 0; }
.info-list span { font-size: .75rem; color: var(--ink-300); letter-spacing: .5px; }
.info-list a, .info-list p { margin: 0; font-size: .9375rem; font-weight: 600; color: var(--ink-900); }
.info-list a:hover { color: var(--blue-500); }

.info-note {
  padding: 18px;
  border-radius: var(--radius);
  background: var(--surface-deep);
}
.info-note strong { display: block; margin-bottom: 4px; font-size: .9375rem; color: var(--ink-900); }
.info-note p { margin: 0 0 12px; font-size: .875rem; color: var(--ink-500); }
.info-links { display: flex; flex-wrap: wrap; gap: 8px; }
.info-links a {
  padding: 6px 14px;
  border: 1px solid rgba(47, 107, 255, .3);
  border-radius: 999px;
  font-size: .8125rem; font-weight: 600;
  background: #fff;
}
.info-links a:hover { border-color: var(--blue-500); background: rgba(47, 107, 255, .07); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--navy-900); color: rgba(255, 255, 255, .62); padding-top: 64px; }
.footer-inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 44px;
}
.footer-brand .brand-text { margin-bottom: 14px; }
.footer-brand strong { display: block; color: #fff; font-size: 1.0625rem; }
.footer-brand small { font-size: .75rem; color: var(--cyan-400); letter-spacing: 1px; }
.footer-brand p { font-size: .875rem; max-width: 34ch; margin: 0; }

.footer-col h4 {
  margin-bottom: 14px;
  font-size: .9375rem; color: #fff;
}
.footer-col li { margin-bottom: 9px; }
.footer-col a { font-size: .875rem; color: rgba(255, 255, 255, .62); }
.footer-col a:hover { color: var(--cyan-400); }

.footer-bottom {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 12px;
  padding: 20px 24px 26px;
  border-top: 1px solid rgba(255, 255, 255, .1);
  font-size: .8125rem;
}
.footer-bottom p { margin: 0; }
.footer-legal { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.footer-legal a { color: rgba(255, 255, 255, .62); }
.footer-legal a:hover { color: var(--cyan-400); }

/* ---------- 滚动入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .cards-4 { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-panel { max-width: 560px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .site-nav {
    position: fixed; inset: var(--header-h) 0 auto;
    flex-direction: column; align-items: stretch; gap: 0;
    margin: 0; padding: 10px 24px 24px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    transform: translateY(-120%);
    opacity: 0; visibility: hidden;
    transition: transform .3s var(--ease), opacity .25s var(--ease), visibility .25s;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
  .site-nav.is-open { transform: translateY(0); opacity: 1; visibility: visible; }
  .site-nav ul { flex-direction: column; gap: 0; }
  .site-nav ul a { display: block; padding: 14px 4px; border-bottom: 1px solid var(--line); }
  .site-nav ul a::after { display: none; }
  .nav-cta { margin-top: 18px; }
  .nav-cta .btn { flex: 1; }
  .nav-toggle { display: block; }

  .cards-3, .solution-grid, .about-inner, .contact-grid { grid-template-columns: 1fr; }
  .arch-row { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 20px 24px; }
}

@media (max-width: 600px) {
  body { font-size: 15px; }
  .container { padding: 0 18px; }
  .cards-4, .contact-form { grid-template-columns: 1fr; }
  .arch-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 26px; }
  .hero-actions .btn { width: 100%; }
  .brand-text small { display: none; }
  .about-metric b { font-size: 1.375rem; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ---------- 打印 ---------- */
@media print {
  .site-header, .nav-toggle, .hero-panel, .contact-form, .skip-link { display: none; }
  body { color: #000; }
  .hero, .section-dark, .site-footer { background: #fff; color: #000; }
  .hero h1, .section-dark h2 { color: #000; }
}