/* =========================================================
   软件开发工作室官网 · 设计系统
   风格：深色科技风 / 玻璃拟态 / 无外部依赖
   ========================================================= */

/* ---------- 设计令牌 ---------- */
:root {
  --bg: #06070a;
  --bg-2: #0a0c11;
  --surface: rgba(255, 255, 255, 0.035);
  --surface-2: rgba(255, 255, 255, 0.065);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.18);

  --text: #e9edf5;
  --text-2: #b3bdcc;
  --muted: #8391a3;

  --c1: #34e5c4;
  --c2: #4f9dff;
  --c3: #9b8cff;
  --grad: linear-gradient(135deg, var(--c1) 0%, var(--c2) 100%);
  --grad-soft: linear-gradient(135deg, rgba(52, 229, 196, .18), rgba(79, 157, 255, .18));

  --radius-sm: 12px;
  --radius: 18px;
  --radius-lg: 26px;
  --shadow: 0 24px 60px -28px rgba(0, 0, 0, .85);
  --glow: 0 0 0 1px rgba(52, 229, 196, .35), 0 12px 40px -12px rgba(52, 229, 196, .35);

  --container: 1160px;
  --ease: cubic-bezier(.16, .84, .44, 1);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
ul { list-style: none; margin: 0; padding: 0; }

::selection { background: rgba(52, 229, 196, .28); color: #fff; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 999;
  background: var(--c1); color: #04150f; padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- 背景装饰 ---------- */
.bg-decor {
  position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden;
}
.bg-decor .blob {
  position: absolute; border-radius: 50%; filter: blur(90px); opacity: .42;
  will-change: transform;
}
.blob-1 { width: 620px; height: 620px; top: -240px; left: -160px; background: radial-gradient(circle, rgba(52,229,196,.55), transparent 68%); animation: float1 22s ease-in-out infinite; }
.blob-2 { width: 700px; height: 700px; top: 12%; right: -260px; background: radial-gradient(circle, rgba(79,157,255,.5), transparent 68%); animation: float2 26s ease-in-out infinite; }
.blob-3 { width: 520px; height: 520px; bottom: -200px; left: 32%; background: radial-gradient(circle, rgba(155,140,255,.42), transparent 68%); animation: float3 30s ease-in-out infinite; }

.grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 78%);
}

@keyframes float1 { 0%,100% { transform: translate3d(0,0,0) } 50% { transform: translate3d(60px, 50px, 0) } }
@keyframes float2 { 0%,100% { transform: translate3d(0,0,0) } 50% { transform: translate3d(-70px, 40px, 0) } }
@keyframes float3 { 0%,100% { transform: translate3d(0,0,0) } 50% { transform: translate3d(40px, -50px, 0) } }

/* ---------- 布局工具 ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }

.section { padding: 110px 0; position: relative; z-index: 1; }
.section-sm { padding: 72px 0; }
.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 7px 15px; border-radius: 999px;
  background: var(--grad-soft); border: 1px solid rgba(52, 229, 196, .26);
  color: var(--c1); font-size: 13px; font-weight: 600; letter-spacing: .04em;
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--c1); box-shadow: 0 0 12px var(--c1); animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 1; transform: scale(1) } 50% { opacity: .45; transform: scale(.8) } }

h1, h2, h3, h4 { margin: 0 0 16px; line-height: 1.25; letter-spacing: -.02em; font-weight: 700; }
h1 { font-size: clamp(34px, 5.4vw, 62px); line-height: 1.14; letter-spacing: -.035em; }
h2 { font-size: clamp(27px, 3.6vw, 42px); }
h3 { font-size: 20px; }
h4 { font-size: 17px; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

.lead { font-size: clamp(16px, 1.6vw, 18.5px); color: var(--text-2); max-width: 620px; }
.section-head.center .lead { margin-left: auto; margin-right: auto; }
.muted { color: var(--muted); }
.mb-0 { margin-bottom: 0; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  height: 50px; padding: 0 26px; border-radius: 999px; border: 1px solid transparent;
  font-size: 15px; font-weight: 600; white-space: nowrap;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease);
  position: relative; overflow: hidden;
}
.btn-primary {
  background: var(--grad); color: #04140f;
  box-shadow: 0 14px 36px -14px rgba(52, 229, 196, .7);
}
.btn-primary::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(120deg, transparent 20%, rgba(255,255,255,.45) 50%, transparent 80%);
  transform: translateX(-130%); transition: transform .7s var(--ease);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 20px 46px -14px rgba(52, 229, 196, .9); }
.btn-primary:hover::after { transform: translateX(130%); }
.btn-ghost {
  background: rgba(255, 255, 255, .04); border-color: var(--border-strong); color: var(--text);
}
.btn-ghost:hover { transform: translateY(-3px); background: rgba(255, 255, 255, .09); border-color: rgba(52, 229, 196, .55); color: #fff; }
.btn-sm { height: 42px; padding: 0 20px; font-size: 14px; }
.btn:focus-visible { outline: 2px solid var(--c1); outline-offset: 3px; }

.link-arrow {
  display: inline-flex; align-items: center; gap: 7px; color: var(--c1); font-weight: 600; font-size: 14.5px;
  transition: gap .3s var(--ease);
}
.link-arrow:hover { gap: 12px; }

/* ---------- 头部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  background: rgba(6, 7, 10, .62);
  border-bottom: 1px solid transparent;
  transition: background .35s var(--ease), border-color .35s var(--ease);
}
.site-header.scrolled { background: rgba(6, 7, 10, .88); border-bottom-color: var(--border); }

.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; gap: 20px; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center;
  background: var(--grad); box-shadow: 0 8px 24px -10px rgba(52, 229, 196, .8);
  flex: 0 0 auto;
}
.brand-mark svg { width: 22px; height: 22px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong { font-size: 16.5px; font-weight: 700; letter-spacing: -.01em; }
.brand-text small { font-size: 10px; letter-spacing: .22em; color: var(--muted); text-transform: uppercase; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav > a {
  position: relative; padding: 9px 15px; border-radius: 10px;
  font-size: 15px; color: var(--text-2);
  transition: color .25s var(--ease), background .25s var(--ease);
}
.nav > a:hover { color: #fff; background: rgba(255, 255, 255, .05); }
.nav > a.active { color: #fff; }
.nav > a.active::after {
  content: ""; position: absolute; left: 15px; right: 15px; bottom: 2px; height: 2px;
  border-radius: 2px; background: var(--grad);
}
.nav-cta { margin-left: 12px; }

.nav-toggle {
  display: none; width: 44px; height: 44px; border-radius: 12px;
  background: rgba(255, 255, 255, .05); border: 1px solid var(--border);
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .3s var(--ease), opacity .3s var(--ease); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 首屏 ---------- */
.hero { padding: 90px 0 0; position: relative; z-index: 1; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 60px; align-items: center; }
.hero-copy h1 { margin: 26px 0 20px; }
.hero-copy .lead { margin-bottom: 34px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 30px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px 22px; }
.hero-points li { display: flex; align-items: center; gap: 8px; font-size: 14.5px; color: var(--text-2); }
.hero-points li::before {
  content: ""; width: 16px; height: 16px; border-radius: 50%; flex: 0 0 auto;
  background: var(--grad-soft); border: 1px solid rgba(52, 229, 196, .5);
  box-shadow: inset 0 0 0 4px rgba(6, 7, 10, .9);
}

/* 代码窗口 */
.hero-visual { position: relative; }
.code-window {
  position: relative; border-radius: var(--radius); overflow: hidden;
  background: linear-gradient(180deg, rgba(16, 19, 26, .96), rgba(9, 11, 16, .96));
  border: 1px solid var(--border); box-shadow: var(--shadow);
}
.code-window::before {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px;
  background: linear-gradient(140deg, rgba(52,229,196,.5), rgba(79,157,255,.35) 40%, transparent 70%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}
.code-bar { display: flex; align-items: center; gap: 7px; padding: 13px 16px; border-bottom: 1px solid var(--border); background: rgba(255,255,255,.02); }
.code-bar span { width: 11px; height: 11px; border-radius: 50%; background: rgba(255, 255, 255, .16); }
.code-bar span:nth-child(1) { background: #ff5f57; }
.code-bar span:nth-child(2) { background: #febc2e; }
.code-bar span:nth-child(3) { background: #28c840; }
.code-bar em { margin-left: auto; font-style: normal; font-family: var(--font-mono); font-size: 12px; color: var(--muted); }

.code-body { margin: 0; padding: 20px 22px 24px; font-family: var(--font-mono); font-size: 13.4px; line-height: 1.95; overflow-x: auto; }
.code-body .line { display: block; opacity: 0; animation: lineIn .55s var(--ease) forwards; animation-delay: calc(var(--i) * .16s + .35s); }
@keyframes lineIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.code-body .k { color: #ff7ab6; }
.code-body .f { color: #4f9dff; }
.code-body .s { color: #34e5c4; }
.code-body .c { color: #5f6b7d; }
.code-body .n { color: #ffc46b; }
.code-muted { color: var(--muted); }

.float-card {
  position: absolute; padding: 12px 16px; border-radius: 14px; font-size: 13px; font-weight: 600;
  background: rgba(12, 15, 21, .9); border: 1px solid var(--border-strong); backdrop-filter: blur(10px);
  box-shadow: var(--shadow); display: flex; align-items: center; gap: 9px; animation: bob 6s ease-in-out infinite;
}
.float-card small { display: block; font-size: 11px; font-weight: 500; color: var(--muted); letter-spacing: .02em; }
.float-card .fc-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--c1); box-shadow: 0 0 10px var(--c1); }
.float-card-1 { left: -26px; bottom: 66px; animation-delay: .6s; }
.float-card-2 { right: -18px; top: 42px; animation-delay: 1.5s; }
@keyframes bob { 0%,100% { transform: translateY(0) } 50% { transform: translateY(-12px) } }

/* 数据条 */
.stats-row {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  margin-top: 86px; border-radius: var(--radius-lg); overflow: hidden;
  background: var(--border); border: 1px solid var(--border);
}
.stat { background: rgba(9, 11, 16, .72); padding: 30px 26px; text-align: center; }
.stat b { display: block; font-size: clamp(26px, 3.4vw, 38px); font-weight: 700; letter-spacing: -.03em;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat span { font-size: 13.5px; color: var(--muted); }

/* 技术标签滚动 */
.marquee { margin-top: 70px; overflow: hidden; position: relative;
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee-track { display: flex; gap: 14px; width: max-content; animation: scrollX 34s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.chip {
  padding: 9px 18px; border-radius: 999px; font-size: 13.5px; color: var(--text-2);
  background: var(--surface); border: 1px solid var(--border); white-space: nowrap;
}
@keyframes scrollX { from { transform: translateX(0) } to { transform: translateX(-50%) } }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  position: relative; padding: 30px 28px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border);
  transition: transform .4s var(--ease), border-color .4s var(--ease), background .4s var(--ease), box-shadow .4s var(--ease);
  overflow: hidden;
}
.card::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; opacity: 0; pointer-events: none;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), rgba(52, 229, 196, .1), transparent 60%);
  transition: opacity .4s var(--ease);
}
.card:hover { transform: translateY(-7px); border-color: rgba(52, 229, 196, .38); background: var(--surface-2); box-shadow: var(--shadow); }
.card:hover::after { opacity: 1; }
.card h3 { margin-bottom: 10px; }
.card p { margin: 0; color: var(--text-2); font-size: 14.8px; }

.card-icon {
  width: 50px; height: 50px; border-radius: 14px; display: grid; place-items: center; margin-bottom: 20px;
  background: var(--grad-soft); border: 1px solid rgba(52, 229, 196, .28); color: var(--c1);
  transition: transform .4s var(--ease);
}
.card:hover .card-icon { transform: scale(1.06) rotate(-4deg); }
.card-icon svg { width: 24px; height: 24px; }

.card-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.tag { padding: 5px 12px; border-radius: 999px; font-size: 12px; color: var(--text-2); background: rgba(255,255,255,.05); border: 1px solid var(--border); }

.card-num {
  position: absolute; top: 22px; right: 24px; font-family: var(--font-mono); font-size: 13px;
  color: rgba(255,255,255,.22); letter-spacing: .1em;
}

/* 案例卡 */
.case-card { display: flex; flex-direction: column; }
.case-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.case-cover {
  height: 168px; border-radius: var(--radius-sm); margin-bottom: 22px; position: relative; overflow: hidden;
  background: linear-gradient(150deg, rgba(52,229,196,.16), rgba(79,157,255,.14) 45%, rgba(155,140,255,.12));
  border: 1px solid var(--border); display: grid; place-items: center;
}
.case-cover::before {
  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: 26px 26px;
}
.case-cover em { position: relative; font-style: normal; font-size: 30px; font-weight: 700; letter-spacing: -.03em;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.case-metrics { display: flex; gap: 26px; margin-top: auto; padding-top: 22px; border-top: 1px solid var(--border); }
.case-metrics div b { display: block; font-size: 20px; font-weight: 700; color: #fff; }
.case-metrics div span { font-size: 12.5px; color: var(--muted); }

/* ---------- 流程时间轴 ---------- */
.steps { position: relative; display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; margin-top: 10px; }
.step { position: relative; padding-top: 46px; }
.step::before {
  content: ""; position: absolute; top: 15px; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, var(--c1), rgba(79,157,255,.5), rgba(255,255,255,.06));
  opacity: .5;
}
.step:last-child::before { background: linear-gradient(90deg, rgba(79,157,255,.6), transparent); }
.step-node {
  position: absolute; top: 0; left: 0; width: 32px; height: 32px; border-radius: 50%;
  display: grid; place-items: center; font-size: 13px; font-weight: 700; color: var(--c1);
  background: rgba(10, 13, 18, .95); border: 1px solid rgba(52, 229, 196, .5);
  box-shadow: 0 0 0 5px rgba(52, 229, 196, .07);
}
.step h4 { margin-bottom: 8px; }
.step p { margin: 0; font-size: 14px; color: var(--text-2); }

/* ---------- 分栏介绍 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split.reverse .split-media { order: 2; }
.feature-list { display: grid; gap: 18px; margin-top: 30px; }
.feature-list li { display: flex; gap: 14px; align-items: flex-start; }
.feature-list .fl-icon {
  width: 34px; height: 34px; border-radius: 10px; flex: 0 0 auto; display: grid; place-items: center;
  background: var(--grad-soft); border: 1px solid rgba(52, 229, 196, .28); color: var(--c1); font-size: 15px; font-weight: 700;
}
.feature-list strong { display: block; font-size: 15.5px; margin-bottom: 2px; }
.feature-list span { font-size: 14px; color: var(--text-2); }

.panel {
  border-radius: var(--radius-lg); padding: 34px; border: 1px solid var(--border);
  background: linear-gradient(160deg, rgba(255,255,255,.055), rgba(255,255,255,.015));
  box-shadow: var(--shadow);
}
.metric-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.metric-grid div { background: rgba(9, 11, 16, .8); padding: 22px; }
.metric-grid b { display: block; font-size: 26px; font-weight: 700; letter-spacing: -.03em; color: #fff; }
.metric-grid span { font-size: 13px; color: var(--muted); }

/* ---------- CTA 区块 ---------- */
.cta-band {
  position: relative; overflow: hidden; border-radius: var(--radius-lg);
  padding: 56px 52px; border: 1px solid rgba(52, 229, 196, .26);
  background: linear-gradient(135deg, rgba(52,229,196,.14), rgba(79,157,255,.12) 55%, rgba(155,140,255,.1));
  display: flex; align-items: center; justify-content: space-between; gap: 36px; flex-wrap: wrap;
}
.cta-band::after {
  content: ""; position: absolute; width: 380px; height: 380px; right: -120px; top: -160px; border-radius: 50%;
  background: radial-gradient(circle, rgba(52,229,196,.35), transparent 70%); filter: blur(50px);
}
.cta-band h2 { margin-bottom: 10px; }
.cta-band p { margin: 0; color: var(--text-2); max-width: 520px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; position: relative; z-index: 1; }

/* ---------- 页面头（子页） ---------- */
.page-head { padding: 76px 0 56px; position: relative; z-index: 1; }
.page-head h1 { margin: 24px 0 18px; }
.crumb { font-size: 13.5px; color: var(--muted); display: flex; gap: 8px; align-items: center; }
.crumb a:hover { color: var(--c1); }

/* ---------- 联系方式 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 40px; align-items: start; }
.info-list { display: grid; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.info-item { background: rgba(10, 12, 17, .82); padding: 22px 24px; display: flex; gap: 16px; align-items: flex-start; }
.info-item .card-icon { margin: 0; width: 42px; height: 42px; border-radius: 12px; }
.info-item .card-icon svg { width: 20px; height: 20px; }
.info-item h4 { margin: 0 0 4px; font-size: 14.5px; color: var(--muted); font-weight: 600; letter-spacing: .02em; }
.info-item p { margin: 0; font-size: 15.5px; word-break: break-all; }

.form { display: grid; gap: 18px; }
.field { display: grid; gap: 8px; }
.field label { font-size: 13.5px; color: var(--text-2); font-weight: 600; }
.field input, .field select, .field textarea {
  width: 100%; padding: 13px 16px; border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, .04); border: 1px solid var(--border);
  color: var(--text); font-family: inherit; font-size: 15px; outline: none;
  transition: border-color .25s var(--ease), background .25s var(--ease), box-shadow .25s var(--ease);
}
.field textarea { min-height: 132px; resize: vertical; line-height: 1.7; }
.field input::placeholder, .field textarea::placeholder { color: #6d7a8c; }
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: rgba(52, 229, 196, .6); background: rgba(255, 255, 255, .06); box-shadow: 0 0 0 4px rgba(52, 229, 196, .1);
}
.field select option { background: #0d1016; color: var(--text); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-note { font-size: 13px; color: var(--muted); margin: 0; }
.form-msg { display: none; padding: 13px 16px; border-radius: var(--radius-sm); font-size: 14px; border: 1px solid rgba(52,229,196,.4); background: rgba(52,229,196,.1); color: var(--c1); }
.form-msg.show { display: block; }

/* ---------- 文本内容页 ---------- */
.doc { max-width: 860px; }
.doc h2 { font-size: 24px; margin: 44px 0 14px; }
.doc h2:first-of-type { margin-top: 0; }
.doc p, .doc li { color: var(--text-2); font-size: 15.2px; }
.doc ul { display: grid; gap: 9px; margin: 14px 0; padding-left: 0; }
.doc ul li { position: relative; padding-left: 20px; }
.doc ul li::before { content: ""; position: absolute; left: 4px; top: 11px; width: 6px; height: 6px; border-radius: 50%; background: var(--c1); opacity: .8; }
.doc .note { margin-top: 34px; padding: 18px 22px; border-radius: var(--radius-sm); background: var(--surface); border: 1px solid var(--border); font-size: 14px; color: var(--muted); }

/* ---------- 常见问题 ---------- */
.faq {
  display: grid; gap: 1px; max-width: 900px; margin: 0 auto;
  background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
}
.faq-item { background: rgba(10, 12, 17, .84); }
.faq-item summary {
  list-style: none; cursor: pointer; padding: 22px 26px;
  font-size: 15.8px; font-weight: 600; display: flex; align-items: center; justify-content: space-between; gap: 18px;
  transition: color .25s var(--ease), background .25s var(--ease);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 21px; font-weight: 400; line-height: 1; color: var(--c1); transition: transform .3s var(--ease); }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item summary:hover { color: var(--c1); background: rgba(255, 255, 255, .025); }
.faq-item > p { margin: 0; padding: 0 26px 24px; color: var(--text-2); font-size: 14.8px; }

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative; z-index: 1; margin-top: 40px; padding: 64px 0 30px;
  border-top: 1px solid var(--border); background: rgba(7, 8, 12, .72);
}
.footer-grid { display: grid; grid-template-columns: 1.8fr 1fr 1fr; gap: 40px; }
.footer-grid h4 { font-size: 14px; letter-spacing: .06em; color: var(--muted); text-transform: uppercase; margin-bottom: 18px; }
.footer-links { display: grid; gap: 11px; }
.footer-links a, .footer-about p { font-size: 14.2px; color: var(--text-2); }
.footer-links a:hover { color: var(--c1); }
.footer-about p { margin: 16px 0 0; max-width: 320px; font-size: 13.6px; color: var(--muted); line-height: 1.9; }
.footer-contact { display: grid; gap: 11px; font-size: 14.2px; color: var(--text-2); word-break: break-all; }

.footer-bottom {
  margin-top: 52px; padding-top: 26px; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  font-size: 13px; color: var(--muted);
}
.beian { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.beian a { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); transition: color .25s var(--ease); }
.beian a:hover { color: var(--c1); }
.beian .sep { opacity: .35; }
.footer-legal { display: flex; gap: 16px; }
.footer-legal a:hover { color: var(--c1); }

/* ---------- 返回顶部 ---------- */
.to-top {
  position: fixed; right: 26px; bottom: 96px; z-index: 70;
  width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center;
  background: rgba(12, 15, 21, .9); border: 1px solid var(--border-strong); backdrop-filter: blur(10px);
  color: var(--text-2); opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s, color .25s, border-color .25s;
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { color: var(--c1); border-color: rgba(52, 229, 196, .55); }
.to-top svg { width: 18px; height: 18px; }

/* ---------- 滚动进场 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: 1fr; gap: 56px; }
  .hero-visual { max-width: 620px; }
  .float-card-1 { left: 0; bottom: 24px; }
  .float-card-2 { right: 0; top: 16px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid .footer-about { grid-column: 1 / -1; }
}

@media (max-width: 980px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr 1fr; }
  .step::before { display: none; }
  .step { padding-top: 0; padding-left: 46px; }
  .step-node { top: 2px; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split.reverse .split-media { order: 0; }
  .contact-grid { grid-template-columns: 1fr; }
  .section { padding: 84px 0; }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav {
    position: fixed; inset: 76px 0 auto 0; flex-direction: column; align-items: stretch; gap: 6px;
    padding: 18px 24px 26px; background: rgba(8, 9, 13, .97); backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    transform: translateY(-12px); opacity: 0; visibility: hidden;
    transition: transform .35s var(--ease), opacity .35s var(--ease), visibility .35s;
    max-height: calc(100vh - 76px); overflow-y: auto;
  }
  .nav.open { transform: none; opacity: 1; visibility: visible; }
  .nav > a { padding: 13px 14px; font-size: 16px; }
  .nav > a.active::after { display: none; }
  .nav > a.active { background: rgba(52, 229, 196, .1); color: var(--c1); }
  .nav-cta { margin: 8px 0 0; }

  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .section { padding: 68px 0; }
  .page-head { padding: 52px 0 34px; }
  .hero { padding-top: 56px; }
  .stats-row { margin-top: 60px; }
  .stat { padding: 22px 18px; }
  .cta-band { padding: 38px 26px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .float-card-1 { bottom: 14px; }
  .float-card-2 { display: none; }
  .to-top { right: 16px; bottom: 20px; width: 42px; height: 42px; }
  .code-body { font-size: 12.4px; padding: 16px; }
}

@media (max-width: 460px) {
  .container { padding: 0 18px; }
  .hero-actions .btn { width: 100%; }
  .btn { height: 48px; }
  .metric-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .case-metrics { gap: 18px; }
}

/* ---------- 无障碍：减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .reveal { opacity: 1; transform: none; }
  .code-body .line { opacity: 1; }
}