/* ============================================================
   GEO Optimizer 平台首页 —— Deep Signal Observatory
   深空观测站视觉：信号绿 + 深海军蓝，等宽字体技术注记，
   全部本地化样式，无外部依赖。
   ============================================================ */
:root {
  --ink: #060b16;
  --ink-2: #0a1322;
  --panel: #0d1a2e;
  --panel-2: #10203a;
  --line: rgba(126, 168, 224, 0.14);
  --line-strong: rgba(126, 168, 224, 0.28);
  --signal: #00e5a0;
  --signal-soft: rgba(0, 229, 160, 0.12);
  --signal-line: rgba(0, 229, 160, 0.35);
  --amber: #ffb454;
  --amber-soft: rgba(255, 180, 84, 0.12);
  --sky: #6fb7ff;
  --text: #e9f0fb;
  --muted: #8ca1c0;
  --dim: #5c7195;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    -apple-system, "Segoe UI", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", Menlo, Consolas,
    "Courier New", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--ink);
  color: var(--text);
  font-size: 15px;
  line-height: 1.7;
  overflow-x: hidden;
}

::selection { background: rgba(0, 229, 160, 0.28); color: #fff; }

a { color: inherit; text-decoration: none; }

/* ---- 全局背景层：网格 + 辉光 ---- */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(1000px 620px at 82% -8%, rgba(0, 229, 160, 0.07), transparent 62%),
    radial-gradient(900px 700px at -12% 34%, rgba(64, 120, 255, 0.09), transparent 60%),
    radial-gradient(760px 520px at 68% 96%, rgba(255, 180, 84, 0.05), transparent 60%),
    var(--ink);
}
.bg-layer::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(126, 168, 224, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126, 168, 224, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(1200px 800px at 50% 0%, #000 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(1200px 800px at 50% 0%, #000 30%, transparent 78%);
}

/* ---- 顶部导航 ---- */
.topnav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 26px;
  height: 62px;
  padding: 0 clamp(18px, 4vw, 44px);
  border-bottom: 1px solid transparent;
  transition: background .3s ease, border-color .3s ease, backdrop-filter .3s ease;
}
.topnav.scrolled {
  background: rgba(6, 11, 22, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 16px;
  letter-spacing: .02em;
  white-space: nowrap;
}
.brand-glyph {
  position: relative;
  width: 26px; height: 26px;
  border: 2px solid var(--signal);
  border-radius: 50%;
  flex: none;
}
.brand-glyph::before {
  content: "";
  position: absolute;
  inset: 5px;
  border-radius: 50%;
  background: var(--signal);
  animation: glyph-pulse 2.4s ease-in-out infinite;
}
@keyframes glyph-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .35; transform: scale(.55); }
}
.brand small {
  font-weight: 400;
  font-size: 11px;
  color: var(--dim);
  font-family: var(--font-mono);
  letter-spacing: .08em;
  margin-left: 2px;
}
.topnav-links { display: flex; gap: 2px; flex: 1; }
.topnav-links a {
  padding: 7px 13px;
  border-radius: 7px;
  font-size: 13.5px;
  color: var(--muted);
  transition: color .2s, background .2s;
}
.topnav-links a:hover { color: #fff; background: rgba(126, 168, 224, 0.1); }
.topnav-right { display: flex; align-items: center; gap: 14px; }
.lang-switch { display: flex; gap: 2px; font-family: var(--font-mono); font-size: 12px; }
.lang-switch a {
  padding: 4px 9px;
  border-radius: 5px;
  color: var(--dim);
  border: 1px solid transparent;
  transition: all .2s;
}
.lang-switch a:hover { color: var(--text); }
.lang-switch a.on { color: var(--signal); border-color: var(--signal-line); background: var(--signal-soft); }
.btn-login {
  padding: 8px 20px;
  border-radius: 8px;
  border: 1px solid var(--signal-line);
  background: var(--signal-soft);
  color: var(--signal) !important;
  font-size: 13.5px;
  font-weight: 600;
  transition: all .25s;
}
.btn-login:hover {
  background: var(--signal);
  color: #04120c !important;
  box-shadow: 0 0 24px rgba(0, 229, 160, 0.35);
}

/* ---- Hero ---- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(28px, 4vw, 60px);
  align-items: center;
  max-width: 1220px;
  margin: 0 auto;
  padding: calc(62px + clamp(48px, 8vh, 92px)) clamp(18px, 4vw, 44px) clamp(40px, 6vh, 72px);
}
.kicker {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .22em;
  color: var(--signal);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.kicker::before {
  content: "";
  width: 34px; height: 1px;
  background: var(--signal);
}
.hero h1 {
  font-size: clamp(34px, 4.6vw, 58px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.015em;
  margin-bottom: 22px;
}
.hero h1 em {
  font-style: normal;
  color: var(--signal);
  position: relative;
  white-space: nowrap;
}
.hero h1 em::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 4px;
  height: 10px;
  background: var(--signal-soft);
  z-index: -1;
  border-radius: 3px;
}
.lede {
  color: var(--muted);
  font-size: 16px;
  max-width: 480px;
  margin-bottom: 32px;
}
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 38px; }
.btn-solid {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 9px;
  background: var(--signal);
  color: #04120c !important;
  font-weight: 700;
  font-size: 15px;
  transition: transform .2s, box-shadow .25s;
}
.btn-solid:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 229, 160, 0.38);
}
.btn-solid .arr { transition: transform .2s; }
.btn-solid:hover .arr { transform: translateX(4px); }
.btn-line {
  display: inline-flex;
  align-items: center;
  padding: 13px 26px;
  border-radius: 9px;
  border: 1px solid var(--line-strong);
  color: var(--text);
  font-weight: 600;
  font-size: 15px;
  transition: border-color .2s, background .2s;
}
.btn-line:hover { border-color: var(--signal-line); background: var(--signal-soft); }
.hero-meta {
  display: flex;
  gap: clamp(20px, 3vw, 44px);
  list-style: none;
  border-top: 1px solid var(--line);
  padding-top: 22px;
}
.hero-meta li { font-size: 12.5px; color: var(--dim); font-family: var(--font-mono); letter-spacing: .04em; }
.hero-meta b {
  display: block;
  font-size: 26px;
  font-weight: 800;
  color: var(--text);
  font-family: var(--font-body);
  letter-spacing: 0;
}
.hero-meta b i { font-style: normal; color: var(--signal); }

/* ---- Hero 右侧：扫描控制台 ---- */
.hero-console { position: relative; }
.radar {
  position: absolute;
  width: 420px; height: 420px;
  right: -80px; top: -90px;
  border-radius: 50%;
  border: 1px solid rgba(0, 229, 160, 0.12);
  z-index: -1;
  background:
    radial-gradient(circle, transparent 54%, rgba(0, 229, 160, 0.05) 55%, transparent 56%),
    radial-gradient(circle, transparent 30%, rgba(0, 229, 160, 0.05) 31%, transparent 32%);
}
.radar::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 0deg, rgba(0, 229, 160, 0.16), transparent 70deg);
  animation: sweep 5.5s linear infinite;
}
@keyframes sweep { to { transform: rotate(360deg); } }

.console-win {
  background: linear-gradient(168deg, #0c1830 0%, #081120 100%);
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(0, 229, 160, 0.05),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
  overflow: hidden;
  transform: perspective(1200px) rotateY(-4deg) rotateX(1.5deg);
  transition: transform .5s ease;
}
.console-win:hover { transform: perspective(1200px) rotateY(0deg) rotateX(0deg); }
.console-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
}
.console-bar i {
  width: 11px; height: 11px;
  border-radius: 50%;
  background: #2a3d5e;
}
.console-bar i:nth-child(1) { background: #ff5f57; }
.console-bar i:nth-child(2) { background: #febc2e; }
.console-bar i:nth-child(3) { background: #28c840; }
.console-bar span {
  margin-left: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--dim);
  letter-spacing: .05em;
}
.console-body {
  padding: 20px 22px 24px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 2.05;
  min-height: 330px;
}
.cl { display: flex; align-items: baseline; gap: 10px; opacity: 0; animation: line-in .4s ease forwards; }
.cl .tag { flex: none; width: 34px; }
.cl .ok { color: var(--signal); }
.cl .run { color: var(--amber); }
.cl .txt { color: #b9c8e2; }
.cl .dots { flex: 1; border-bottom: 1px dotted rgba(126, 168, 224, 0.25); transform: translateY(-4px); }
.cl .val { color: var(--muted); }
.cl.cmd .txt { color: #e9f0fb; }
.cl.cmd .prompt { color: var(--signal); }
.cursor {
  display: inline-block;
  width: 8px; height: 15px;
  background: var(--signal);
  vertical-align: -2px;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
@keyframes line-in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.cl:nth-child(1) { animation-delay: .3s; }
.cl:nth-child(2) { animation-delay: .9s; }
.cl:nth-child(3) { animation-delay: 1.4s; }
.cl:nth-child(4) { animation-delay: 1.9s; }
.cl:nth-child(5) { animation-delay: 3.6s; }
.cl:nth-child(6) { animation-delay: 4.1s; }
.cl:nth-child(7) { animation-delay: 4.5s; }
/* 引擎评分条 */
.score-line {
  display: grid;
  grid-template-columns: 92px 1fr 30px;
  align-items: center;
  gap: 12px;
  opacity: 0;
  animation: line-in .4s ease forwards;
}
.score-line .eng { font-family: var(--font-mono); font-size: 12px; color: var(--muted); }
.score-line .bar {
  height: 7px;
  border-radius: 99px;
  background: rgba(126, 168, 224, 0.12);
  overflow: hidden;
}
.score-line .bar i {
  display: block;
  height: 100%;
  border-radius: 99px;
  background: linear-gradient(90deg, #0aa06f, var(--signal));
  width: 0;
  animation: fill 1s cubic-bezier(.25, .8, .35, 1) forwards;
}
.score-line .bar i.warm { background: linear-gradient(90deg, #c77b2a, var(--amber)); }
.score-line .num { font-family: var(--font-mono); font-size: 12px; color: var(--text); text-align: right; }
.score-line:nth-of-type(1) { animation-delay: 2.2s; }
.score-line:nth-of-type(2) { animation-delay: 2.45s; }
.score-line:nth-of-type(3) { animation-delay: 2.7s; }
.score-line:nth-of-type(4) { animation-delay: 2.95s; }
.score-line:nth-of-type(1) .bar i { animation-delay: 2.3s; }
.score-line:nth-of-type(2) .bar i { animation-delay: 2.55s; }
.score-line:nth-of-type(3) .bar i { animation-delay: 2.8s; }
.score-line:nth-of-type(4) .bar i { animation-delay: 3.05s; }
@keyframes fill { to { width: var(--w); } }

/* ---- 引擎跑马灯 ---- */
.engine-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(13, 26, 46, 0.4);
  overflow: hidden;
  padding: 15px 0;
}
.marquee { display: flex; width: max-content; animation: marquee 30s linear infinite; }
.marquee:hover { animation-play-state: paused; }
.marquee span {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--dim);
  padding: 0 26px;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 26px;
}
.marquee b { color: var(--muted); font-weight: 600; }
.marquee em { font-style: normal; color: var(--signal); font-size: 9px; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---- 通用 Section ---- */
.section {
  max-width: 1220px;
  margin: 0 auto;
  padding: clamp(64px, 10vh, 110px) clamp(18px, 4vw, 44px);
}
.sec-head { margin-bottom: clamp(34px, 5vh, 54px); max-width: 640px; }
.sec-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--signal);
  margin-bottom: 14px;
  display: block;
}
.sec-head h2 {
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin-bottom: 14px;
}
.sec-head p { color: var(--muted); }

/* 滚动浮现 */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---- 全链路 Pipeline ---- */
.pipe {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  list-style: none;
  counter-reset: step;
  position: relative;
}
.pipe::before {
  content: "";
  position: absolute;
  top: 26px;
  left: 8%;
  right: 8%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--signal-line) 18%, var(--signal-line) 82%, transparent);
}
.pipe li {
  position: relative;
  padding: 0 14px;
  text-align: center;
  counter-increment: step;
}
.pipe .node {
  width: 52px; height: 52px;
  margin: 0 auto 18px;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: var(--panel);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--signal);
  position: relative;
  z-index: 1;
  transition: all .3s;
}
.pipe li:hover .node {
  border-color: var(--signal-line);
  background: var(--signal-soft);
  box-shadow: 0 0 26px rgba(0, 229, 160, 0.22);
  transform: translateY(-4px);
}
.pipe .node::before { content: "0" counter(step); }
.pipe h3 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.pipe p { font-size: 12.5px; color: var(--dim); line-height: 1.65; }

/* ---- 核心能力 Bento ---- */
.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 16px;
}
.cell {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(170deg, var(--panel) 0%, rgba(13, 26, 46, 0.5) 100%);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: border-color .3s, transform .3s, box-shadow .3s;
}
.cell:hover {
  border-color: var(--signal-line);
  transform: translateY(-4px);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.4);
}
.cell .tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--signal);
  display: block;
  margin-bottom: 14px;
}
.cell h3 { font-size: 19px; font-weight: 800; margin-bottom: 10px; }
.cell > p { color: var(--muted); font-size: 13.5px; }
.cell-score { grid-column: span 7; grid-row: span 2; }
.cell-audit { grid-column: span 5; }
.cell-plan { grid-column: span 5; }
.cell-export { grid-column: span 12; }

/* 评分演示 */
.demo-scores { margin-top: 26px; display: grid; gap: 14px; }
.demo-row { display: grid; grid-template-columns: 118px 1fr 40px; gap: 14px; align-items: center; }
.demo-row .eng { font-family: var(--font-mono); font-size: 12.5px; color: var(--muted); }
.demo-row .track { height: 9px; border-radius: 99px; background: rgba(126, 168, 224, 0.1); overflow: hidden; }
.demo-row .track i {
  display: block; height: 100%; width: 0; border-radius: 99px;
  background: linear-gradient(90deg, #0aa06f, var(--signal));
  transition: width 1.2s cubic-bezier(.25, .8, .35, 1) .2s;
}
.demo-row .track i.warm { background: linear-gradient(90deg, #c77b2a, var(--amber)); }
.in .demo-row .track i { width: var(--w); }
.demo-row .num { font-family: var(--font-mono); font-size: 13px; text-align: right; }
.demo-overall {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px dashed var(--line-strong);
  display: flex;
  align-items: baseline;
  gap: 14px;
}
.demo-overall b { font-size: 46px; font-weight: 800; color: var(--signal); letter-spacing: -0.02em; }
.demo-overall span { color: var(--dim); font-size: 13px; font-family: var(--font-mono); }

/* 体检清单演示 */
.check-list { margin-top: 18px; list-style: none; display: grid; gap: 9px; }
.check-list li {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; color: var(--muted);
  font-family: var(--font-mono);
}
.check-list .st { flex: none; width: 18px; height: 18px; border-radius: 5px; display: inline-flex; align-items: center; justify-content: center; font-size: 11px; }
.check-list .pass { background: var(--signal-soft); color: var(--signal); border: 1px solid var(--signal-line); }
.check-list .fail { background: var(--amber-soft); color: var(--amber); border: 1px solid rgba(255, 180, 84, 0.35); }

/* 方案条目演示 */
.plan-chips { margin-top: 18px; display: grid; gap: 9px; }
.plan-chip {
  display: flex; align-items: center; gap: 10px;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 9px 13px;
  font-size: 12.5px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.015);
}
.plan-chip .prio {
  flex: none;
  font-family: var(--font-mono);
  font-size: 10.5px;
  padding: 2px 8px;
  border-radius: 99px;
}
.prio.high { background: rgba(240, 98, 98, 0.14); color: #f08a8a; }
.prio.mid { background: var(--amber-soft); color: var(--amber); }
.prio.low { background: var(--signal-soft); color: var(--signal); }

/* 导出平台 chips */
.export-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 6px; }
.export-chips span {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 7px 15px;
  border-radius: 99px;
  border: 1px solid var(--line-strong);
  color: var(--muted);
  transition: all .25s;
  cursor: default;
}
.export-chips span:hover {
  border-color: var(--signal-line);
  color: var(--signal);
  background: var(--signal-soft);
  transform: translateY(-2px);
}
.cell-export .inner { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); gap: 30px; align-items: center; }

/* ---- 开放 API ---- */
.api-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(28px, 4vw, 56px); align-items: center; }
.endpoints { list-style: none; margin: 24px 0 28px; display: grid; gap: 9px; }
.endpoints li {
  display: flex; align-items: center; gap: 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.015);
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--muted);
  transition: border-color .2s, transform .2s;
}
.endpoints li:hover { border-color: var(--signal-line); transform: translateX(4px); }
.endpoints .m {
  flex: none;
  font-size: 10.5px;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 5px;
  letter-spacing: .06em;
}
.m.post { background: var(--signal-soft); color: var(--signal); }
.m.get { background: rgba(111, 183, 255, 0.12); color: var(--sky); }
.api-code {
  background: linear-gradient(168deg, #0c1830 0%, #081120 100%);
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  padding: 24px 26px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.95;
  color: #b9c8e2;
  overflow-x: auto;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.45);
  position: relative;
}
.api-code::before {
  content: "bash";
  position: absolute;
  top: 12px; right: 16px;
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--dim);
  text-transform: uppercase;
}
.api-code .c { color: #54688c; }
.api-code .g { color: var(--signal); }
.api-code .a { color: var(--amber); }
.api-code .u { color: var(--sky); }

/* ---- 资源中心 ---- */
.res-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.res-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(170deg, var(--panel) 0%, rgba(13, 26, 46, 0.5) 100%);
  padding: 30px 28px;
  transition: border-color .3s, transform .3s, box-shadow .3s;
  position: relative;
  overflow: hidden;
}
.res-card::after {
  content: "→";
  position: absolute;
  right: 24px; bottom: 20px;
  font-size: 20px;
  color: var(--dim);
  transition: transform .3s, color .3s;
}
.res-card:hover { border-color: var(--signal-line); transform: translateY(-5px); box-shadow: 0 18px 48px rgba(0, 0, 0, 0.4); }
.res-card:hover::after { transform: translateX(6px); color: var(--signal); }
.res-icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 21px;
  margin-bottom: 20px;
  border: 1px solid var(--signal-line);
  background: var(--signal-soft);
}
.res-card h3 { font-size: 18px; font-weight: 800; margin-bottom: 9px; }
.res-card p { color: var(--muted); font-size: 13.5px; flex: 1; margin-bottom: 26px; }
.res-card .meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--dim);
}
.res-card .meta b { color: var(--signal); font-weight: 600; }

/* ---- FAQ ---- */
.faq-wrap { max-width: 820px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-bottom: 12px;
  background: rgba(13, 26, 46, 0.45);
  overflow: hidden;
  transition: border-color .25s;
}
.faq-item[open] { border-color: var(--signal-line); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 19px 24px;
  font-weight: 700;
  font-size: 15.5px;
  transition: color .2s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--signal); }
.faq-item summary::before {
  content: "Q";
  flex: none;
  width: 30px; height: 30px;
  border-radius: 8px;
  border: 1px solid var(--signal-line);
  background: var(--signal-soft);
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 13px;
  display: flex; align-items: center; justify-content: center;
}
.faq-item summary::after {
  content: "+";
  margin-left: auto;
  font-size: 20px;
  color: var(--dim);
  font-weight: 400;
  transition: transform .3s;
}
.faq-item[open] summary::after { transform: rotate(45deg); color: var(--signal); }
.faq-item .ans {
  padding: 0 24px 22px 70px;
  color: var(--muted);
  font-size: 14px;
  animation: ans-in .35s ease;
}
@keyframes ans-in { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }

/* ---- CTA ---- */
.cta-band {
  position: relative;
  text-align: center;
  padding: clamp(70px, 12vh, 120px) 24px;
  border-top: 1px solid var(--line);
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  left: 50%; top: 0;
  transform: translateX(-50%);
  width: 760px; height: 380px;
  background: radial-gradient(ellipse at top, rgba(0, 229, 160, 0.1), transparent 68%);
  pointer-events: none;
}
.cta-band .sec-tag { justify-content: center; display: flex; align-items: center; gap: 10px; }
.cta-band h2 {
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 800;
  letter-spacing: -0.015em;
  margin-bottom: 30px;
}
.cta-band h2 i { font-style: normal; color: var(--signal); }

/* ---- Footer ---- */
.footer {
  border-top: 1px solid var(--line);
  background: rgba(8, 15, 28, 0.6);
  padding: 44px clamp(18px, 4vw, 44px) 34px;
}
.footer-inner {
  max-width: 1220px;
  margin: 0 auto;
  display: flex;
  align-items: flex-start;
  gap: 40px;
  flex-wrap: wrap;
}
.footer .f-brand { flex: 1; min-width: 240px; }
.footer .f-brand p { color: var(--dim); font-size: 12.5px; margin-top: 10px; max-width: 320px; }
.footer .f-col { display: flex; flex-direction: column; gap: 9px; }
.footer .f-col b {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--dim);
  margin-bottom: 4px;
  font-weight: 600;
}
.footer .f-col a { color: var(--muted); font-size: 13.5px; transition: color .2s; }
.footer .f-col a:hover { color: var(--signal); }
.footer-bottom {
  max-width: 1220px;
  margin: 34px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--dim);
}

/* ---- 响应式 ---- */
@media (max-width: 1020px) {
  .hero { grid-template-columns: 1fr; padding-top: calc(62px + 44px); }
  .hero-console { max-width: 640px; }
  .console-win { transform: none; }
  .radar { display: none; }
  .cell-score { grid-column: span 12; grid-row: auto; }
  .cell-audit, .cell-plan { grid-column: span 6; }
  .api-grid { grid-template-columns: 1fr; }
  .pipe { grid-template-columns: 1fr; gap: 26px; }
  .pipe::before { display: none; }
  .pipe li { display: grid; grid-template-columns: 52px 1fr; gap: 16px; text-align: left; padding: 0; }
  .pipe .node { margin: 0; }
  .res-grid { grid-template-columns: 1fr; }
  .cell-export .inner { grid-template-columns: 1fr; gap: 18px; }
}
@media (max-width: 640px) {
  .topnav-links { display: none; }
  .cell-audit, .cell-plan { grid-column: span 12; }
  .hero-meta { flex-wrap: wrap; gap: 18px; }
  .faq-item .ans { padding-left: 24px; }
}