/* ============================================================
   小奇鱼科技 · AI 智能体定制开发官网
   纯手写 CSS，无外部依赖
   ============================================================ */

:root {
  --bg: #05060f;
  --bg-2: #080b1a;
  --panel: rgba(255, 255, 255, 0.035);
  --panel-2: rgba(255, 255, 255, 0.055);
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #e9edfa;
  --text-2: #a8b1cb;
  --text-3: #6f7896;
  --cyan: #00e5ff;
  --purple: #7c5cff;
  --pink: #ff4ecd;
  --lime: #6cf7b0;
  --grad: linear-gradient(120deg, #00e5ff 0%, #7c5cff 55%, #ff4ecd 100%);
  --grad-soft: linear-gradient(120deg, rgba(0, 229, 255, .16), rgba(124, 92, 255, .16));
  --radius: 18px;
  --radius-lg: 26px;
  --shadow: 0 24px 70px -30px rgba(0, 0, 0, .9);
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Courier New", monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

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

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
img, svg { display: block; max-width: 100%; }
::selection { background: rgba(0, 229, 255, .3); color: #fff; }

/* 无障碍：键盘焦点可见 */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 6px;
}

/* 无障碍：跳转到主内容（仅键盘聚焦时出现） */
.skip-link {
  position: fixed; top: 12px; left: 12px; z-index: 1000;
  padding: 12px 22px; border-radius: 99px;
  background: var(--grad); color: #05060f; font-weight: 650; font-size: 14px;
  transform: translateY(-180%); transition: transform .28s cubic-bezier(.2, .8, .3, 1);
}
.skip-link:focus { transform: none; }

/* 仅供屏幕阅读器 / 爬虫读取的文本 */
.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;
}

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #05060f; }
::-webkit-scrollbar-thumb { background: linear-gradient(#00e5ff, #7c5cff); border-radius: 99px; border: 2px solid #05060f; }

/* ---------------- 背景层 ---------------- */
.bg-layer { position: fixed; inset: 0; z-index: -2; overflow: hidden; pointer-events: none; }

.bg-grid {
  position: absolute; inset: -2px;
  background-image:
    linear-gradient(rgba(124, 92, 255, .075) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, .06) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 65% at 50% 0%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 65% at 50% 0%, #000 0%, transparent 78%);
}

.bg-noise {
  position: absolute; inset: 0; opacity: .035; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)'/%3E%3C/svg%3E");
}

.orb { position: absolute; border-radius: 50%; filter: blur(110px); opacity: .5; }
.orb-1 { width: 620px; height: 620px; background: #0b6c8f; top: -240px; left: -160px; animation: drift1 26s ease-in-out infinite; }
.orb-2 { width: 560px; height: 560px; background: #4a2a9e; top: 8%; right: -200px; animation: drift2 32s ease-in-out infinite; }
.orb-3 { width: 480px; height: 480px; background: #8c1f66; bottom: -180px; left: 42%; opacity: .3; animation: drift1 38s ease-in-out infinite reverse; }

@keyframes drift1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(120px, 90px) scale(1.15); }
}
@keyframes drift2 {
  0%, 100% { transform: translate(0, 0) scale(1.1); }
  50% { transform: translate(-140px, 120px) scale(.92); }
}

/* 鼠标光晕 */
.cursor-glow {
  position: fixed; width: 620px; height: 620px; border-radius: 50%;
  pointer-events: none; z-index: -1; opacity: 0;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(0, 229, 255, .1) 0%, rgba(124, 92, 255, .06) 35%, transparent 68%);
  transition: opacity .6s ease;
}
.cursor-glow.on { opacity: 1; }

/* 滚动进度 */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0;
  background: var(--grad); z-index: 999; box-shadow: 0 0 14px rgba(0, 229, 255, .8);
}

/* ---------------- 通用 ---------------- */
.container { width: min(1240px, 92vw); margin: 0 auto; }
.container-narrow { width: min(920px, 92vw); }

.section { padding: 72px 0; position: relative; }
.section-alt { background: linear-gradient(180deg, transparent, rgba(124, 92, 255, .045) 30%, rgba(124, 92, 255, .045) 70%, transparent); }

.sec-head { max-width: 840px; margin-bottom: 52px; }
.sec-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--cyan); font-weight: 600;
  padding: 6px 14px; border-radius: 99px;
  border: 1px solid rgba(0, 229, 255, .28);
  background: rgba(0, 229, 255, .06);
  margin-bottom: 20px;
}
.sec-tag::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }

.sec-title { font-size: clamp(25px, 3.6vw, 46px); line-height: 1.28; font-weight: 700; letter-spacing: -.01em; }
.sec-desc { margin-top: 20px; color: var(--text-2); font-size: 16.5px; max-width: 760px; }

.grad-text {
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  background-size: 200% auto; animation: shift 6s linear infinite;
  white-space: nowrap;
}
@keyframes shift { to { background-position: 200% center; } }

/* ---------------- 按钮 ---------------- */
.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 26px; border-radius: 99px; font-size: 15px; font-weight: 600;
  letter-spacing: .01em; white-space: nowrap; overflow: hidden;
  transition: transform .28s cubic-bezier(.2, .8, .3, 1), box-shadow .28s, border-color .28s, color .28s;
}
.btn-lg { padding: 16px 34px; font-size: 16px; }
.btn-sm { padding: 10px 20px; font-size: 14px; }

.btn-primary { color: #05060f; background: var(--grad); background-size: 180% auto; box-shadow: 0 12px 34px -12px rgba(0, 229, 255, .75); }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 20px 46px -14px rgba(124, 92, 255, .9); background-position: 100% center; }
.btn-primary::after {
  content: ""; position: absolute; top: 0; left: -120%; width: 60%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .55), transparent);
  transform: skewX(-18deg);
}
.btn-primary:hover::after { animation: shine .85s ease; }
@keyframes shine { to { left: 130%; } }

.btn-ghost { color: var(--text); border: 1px solid var(--line-strong); background: rgba(255, 255, 255, .03); backdrop-filter: blur(10px); }
.btn-ghost:hover { transform: translateY(-3px); border-color: rgba(0, 229, 255, .55); color: var(--cyan); box-shadow: 0 16px 40px -20px rgba(0, 229, 255, .7); }

/* ---------------- 导航 ---------------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 18px 0; transition: padding .35s, background .35s, backdrop-filter .35s, border-color .35s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  padding: 11px 0; background: rgba(5, 6, 15, .78);
  backdrop-filter: blur(18px) saturate(160%); -webkit-backdrop-filter: blur(18px);
  border-bottom-color: var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }

.logo { display: flex; align-items: center; gap: 12px; }
.logo-mark { display: grid; place-items: center; filter: drop-shadow(0 0 12px rgba(0, 229, 255, .5)); }
.logo-text { display: flex; flex-direction: column; line-height: 1.25; }
.logo-text strong { font-size: 17px; font-weight: 700; letter-spacing: .02em; }
.logo-text em { font-style: normal; font-size: 9.5px; letter-spacing: .22em; color: var(--text-3); font-family: var(--mono); }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links > a:not(.btn) {
  position: relative; padding: 8px 14px; font-size: 14.5px; color: var(--text-2);
  border-radius: 99px; transition: color .25s, background .25s;
}
.nav-links > a:not(.btn):hover { color: var(--text); background: rgba(255, 255, 255, .05); }
.nav-links > a:not(.btn)::after {
  content: ""; position: absolute; left: 50%; bottom: 2px; width: 0; height: 1.5px;
  background: var(--grad); transform: translateX(-50%); transition: width .3s;
}
.nav-links > a:not(.btn):hover::after { width: 40%; }
.nav-cta { margin-left: 12px; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .3s, opacity .3s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------------- 首屏 ---------------- */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; padding: 150px 0 90px; overflow: hidden; }
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .85; }
.hero-scan {
  position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg, transparent 0%, rgba(0, 229, 255, .035) 50%, transparent 100%);
  background-size: 100% 260px; animation: scan 9s linear infinite;
}
@keyframes scan { 0% { background-position: 0 -260px; } 100% { background-position: 0 calc(100% + 260px); } }
.hero-inner { position: relative; z-index: 2; text-align: center; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 9px 20px; border-radius: 99px; font-size: 13.5px; color: var(--text-2);
  border: 1px solid var(--line); background: rgba(255, 255, 255, .04);
  backdrop-filter: blur(12px); margin-bottom: 34px;
}
.pulse-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 0 0 rgba(108, 247, 176, .7); animation: pulse 2s infinite; }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(108, 247, 176, .7); }
  70% { box-shadow: 0 0 0 12px rgba(108, 247, 176, 0); }
  100% { box-shadow: 0 0 0 0 rgba(108, 247, 176, 0); }
}

.hero-title {
  font-size: clamp(38px, 6.4vw, 82px); font-weight: 800; line-height: 1.12;
  letter-spacing: -.025em; margin-bottom: 26px;
  text-shadow: 0 0 60px rgba(0, 229, 255, .18);
}
.hero-sub { color: var(--text-2); font-size: clamp(15.5px, 1.5vw, 18.5px); max-width: 800px; margin: 0 auto 40px; }
.typed-wrap { color: var(--cyan); font-weight: 600; }
.typed { }
.caret { display: inline-block; width: 2px; height: 1.05em; background: var(--cyan); margin-left: 2px; vertical-align: -3px; animation: blink .9s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 74px; }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  background: var(--line); overflow: hidden; backdrop-filter: blur(14px);
}
.stat { background: rgba(8, 11, 26, .74); padding: 28px 18px; transition: background .3s; }
.stat:hover { background: rgba(0, 229, 255, .07); }
.stat-num { font-size: clamp(26px, 3vw, 40px); font-weight: 800; line-height: 1; font-family: var(--mono); }
.stat-num i { font-style: normal; font-size: .5em; margin-left: 2px; background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat-label { margin-top: 12px; font-size: 13px; color: var(--text-3); line-height: 1.5; }

.scroll-hint {
  position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  font-size: 11.5px; letter-spacing: .18em; color: var(--text-3); text-transform: uppercase;
}
.scroll-hint span { width: 1px; height: 42px; background: linear-gradient(180deg, transparent, var(--cyan)); animation: hintMove 2s ease-in-out infinite; }
@keyframes hintMove { 0%, 100% { transform: scaleY(.4); opacity: .4; } 50% { transform: scaleY(1); opacity: 1; } }

/* ---------------- 生态兼容（三层传送带） ---------------- */
.eco-section { position: relative; padding: 72px 0 80px; overflow: hidden; }

.eco-aura { position: absolute; inset: 0; pointer-events: none; }
.eco-orb { position: absolute; border-radius: 50%; }
.eco-orb-a {
  width: 1100px; height: 1100px; top: -540px; left: 50%; margin-left: -730px;
  background: radial-gradient(circle, rgba(0, 162, 205, .2) 0%, rgba(10, 96, 131, .1) 40%, transparent 70%);
}
.eco-orb-b {
  width: 900px; height: 900px; bottom: -470px; right: -150px;
  background: radial-gradient(circle, rgba(124, 92, 255, .18) 0%, rgba(75, 42, 166, .09) 42%, transparent 70%);
}
.eco-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124, 92, 255, .05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 68% 58% at 50% 46%, #000, transparent 76%);
  -webkit-mask-image: radial-gradient(ellipse 68% 58% at 50% 46%, #000, transparent 76%);
}

.eco-head { position: relative; text-align: center; max-width: 880px; margin: 0 auto; }
.eco-title { font-size: clamp(25px, 3.4vw, 44px); line-height: 1.3; font-weight: 750; letter-spacing: -.015em; }
.eco-desc { margin: 18px auto 0; max-width: 640px; color: var(--text-2); font-size: 16px; line-height: 1.8; }

.eco-metrics { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 30px; }
.eco-metrics span {
  display: inline-flex; align-items: baseline; gap: 7px;
  padding: 10px 20px; border-radius: 99px; font-size: 13.5px; color: var(--text-3);
  border: 1px solid var(--line); background: rgba(255, 255, 255, .03);
  backdrop-filter: blur(10px);
}
.eco-metrics b {
  font-family: var(--mono); font-size: 17px; font-weight: 700;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

/* 传送带容器 */
.eco-wall { position: relative; margin-top: 42px; padding: 26px 0 118px; perspective: 1600px; overflow: hidden; }
.eco-wall::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 52% 74% at 50% 42%, rgba(0, 229, 255, .085), transparent 72%);
  pointer-events: none;
}
.eco-belts { position: relative; z-index: 2; transform: rotateX(9deg); transform-origin: 50% 42%; }

/* 透视网格地板 —— 传送带下方的「数据空间」 */
.eco-floor {
  position: absolute; left: 0; right: 0; bottom: 0; height: 124px;
  overflow: hidden; pointer-events: none; z-index: 1;
  perspective: 300px; perspective-origin: 50% 0%;
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, .7) 46%, transparent 94%);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, .7) 46%, transparent 94%);
}
.eco-floor i {
  position: absolute; left: -75%; right: -75%; top: 0; bottom: -220%;
  background-image:
    linear-gradient(90deg, rgba(0, 229, 255, .62) 1px, transparent 1px),
    linear-gradient(180deg, rgba(124, 92, 255, .55) 1px, transparent 1px);
  background-size: 74px 62px;
  transform: rotateX(74deg); transform-origin: 50% 0;
  animation: floorRun 4.2s linear infinite;
}
@keyframes floorRun { from { background-position: 0 0, 0 0; } to { background-position: 0 62px, 0 62px; } }

/* 地平线光带 */
.eco-horizon {
  position: absolute; left: 0; right: 0; bottom: 112px; height: 1px; z-index: 1;
  background: linear-gradient(90deg, transparent 4%, rgba(0, 229, 255, .85) 32%, rgba(124, 92, 255, .9) 62%, transparent 96%);
  box-shadow: 0 0 34px 3px rgba(0, 229, 255, .7), 0 0 78px 10px rgba(124, 92, 255, .45);
  opacity: .95; pointer-events: none;
}
.eco-horizon::after {
  content: ""; position: absolute; left: 50%; top: 50%; width: 340px; height: 340px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(0, 229, 255, .22), transparent 68%);
  animation: horizonPulse 5s ease-in-out infinite;
}
@keyframes horizonPulse { 0%, 100% { opacity: .55; transform: translate(-50%, -50%) scale(1); } 50% { opacity: 1; transform: translate(-50%, -50%) scale(1.18); } }

.eco-scan {
  position: absolute; left: -6%; right: -6%; height: 170px; top: -170px; z-index: 3;
  background: linear-gradient(180deg, transparent, rgba(0, 229, 255, .1), rgba(255, 255, 255, .055), transparent);
  filter: blur(7px); pointer-events: none;
  animation: ecoScan 8.5s cubic-bezier(.55, 0, .45, 1) infinite;
}
@keyframes ecoScan {
  0% { top: -170px; }
  62%, 100% { top: 100%; }
}

.eco-belt {
  position: relative; overflow: hidden;
  padding: 12px 0; border-radius: 16px; border: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(0, 229, 255, .05), rgba(124, 92, 255, .055) 50%, rgba(255, 78, 205, .04));
  backdrop-filter: blur(10px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .05);
  mask-image: linear-gradient(90deg, transparent, #000 11%, #000 89%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 11%, #000 89%, transparent);
  transition: border-color .4s, box-shadow .4s;
}
.eco-belt + .eco-belt { margin-top: 15px; }
.eco-belt::after {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(0, 229, 255, .85) 25%, rgba(255, 78, 205, .7) 50%, rgba(0, 229, 255, .85) 75%, transparent 100%);
  background-size: 220% 100%;
  animation: beltLine 6s linear infinite;
  opacity: .5; transition: opacity .4s;
}
@keyframes beltLine { to { background-position: -220% 0; } }
.eco-belt:hover {
  border-color: rgba(0, 229, 255, .34);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .08), 0 26px 64px -42px rgba(0, 229, 255, .95);
}
.eco-belt:hover::after { opacity: 1; }

.eco-track { display: flex; width: max-content; animation: ecoScroll 48s linear infinite; }
.eco-belt-a .eco-track { animation-duration: 46s; }
.eco-belt-b .eco-track { animation-duration: 62s; animation-direction: reverse; }
.eco-belt-c .eco-track { animation-duration: 76s; }
.eco-belt:hover .eco-track { animation-play-state: paused; }
@keyframes ecoScroll { to { transform: translateX(-50%); } }

.eco-chip {
  display: inline-flex; align-items: center; gap: 10px;
  margin-right: 13px; padding: 10px 19px; border-radius: 99px;
  border: 1px solid rgba(255, 255, 255, .11); background: rgba(255, 255, 255, .05);
  font-size: 14px; font-weight: 500; color: var(--text-2); white-space: nowrap;
  transition: transform .3s cubic-bezier(.2, .8, .3, 1), border-color .3s, color .3s, background .3s, box-shadow .3s;
}
.eco-chip i { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; background: var(--cyan); }
.eco-chip:nth-child(4n+1) i { background: var(--cyan); box-shadow: 0 0 11px rgba(0, 229, 255, .95); }
.eco-chip:nth-child(4n+2) i { background: var(--purple); box-shadow: 0 0 11px rgba(124, 92, 255, .95); }
.eco-chip:nth-child(4n+3) i { background: var(--pink); box-shadow: 0 0 11px rgba(255, 78, 205, .95); }
.eco-chip:nth-child(4n+4) i { background: var(--lime); box-shadow: 0 0 11px rgba(108, 247, 176, .95); }
.eco-chip:hover {
  transform: translateY(-3px) scale(1.04);
  color: var(--text); border-color: rgba(0, 229, 255, .5);
  background: rgba(0, 229, 255, .09);
  box-shadow: 0 14px 30px -16px rgba(0, 229, 255, .95);
}

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

.card {
  position: relative; padding: 34px 30px; border-radius: var(--radius-lg);
  border: 1px solid var(--line); background: var(--panel);
  backdrop-filter: blur(14px); overflow: hidden;
  transition: transform .4s cubic-bezier(.2, .8, .3, 1), border-color .4s, background .4s;
}
.card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; opacity: 0;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 0%), rgba(0, 229, 255, .13), transparent 60%);
  transition: opacity .4s; pointer-events: none;
}
.card:hover::before { opacity: 1; }
.card::after {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 229, 255, .8), transparent);
  opacity: 0; transition: opacity .4s;
}
.card:hover::after { opacity: 1; }
.card:hover { transform: translateY(-6px); border-color: rgba(0, 229, 255, .3); background: var(--panel-2); }

.card-icon {
  width: 52px; height: 52px; border-radius: 15px; display: grid; place-items: center;
  background: var(--grad-soft); border: 1px solid rgba(0, 229, 255, .22);
  margin-bottom: 22px; transition: transform .4s;
}
.card-icon svg { width: 26px; height: 26px; fill: var(--cyan); }
.card:hover .card-icon { transform: translateY(-3px) rotate(-4deg); }
.card h3 { font-size: 19px; font-weight: 700; margin-bottom: 12px; letter-spacing: -.01em; }
.card p { color: var(--text-2); font-size: 14.6px; line-height: 1.8; }
.card-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.card-tags span {
  font-size: 12px; color: var(--text-3); padding: 4px 11px; border-radius: 99px;
  border: 1px solid var(--line); background: rgba(255, 255, 255, .03);
}

/* ---------------- 智能体卡片 ---------------- */
.agent-card {
  position: relative; padding: 32px 28px; border-radius: var(--radius-lg);
  border: 1px solid var(--line); background: linear-gradient(160deg, rgba(255, 255, 255, .05), rgba(255, 255, 255, .015));
  backdrop-filter: blur(14px); overflow: hidden;
  transition: transform .45s cubic-bezier(.2, .8, .3, 1), border-color .45s;
}
.agent-glow {
  position: absolute; top: -60%; right: -30%; width: 300px; height: 300px; border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 92, 255, .35), transparent 65%);
  filter: blur(40px); opacity: 0; transition: opacity .5s;
}
.agent-card:nth-child(2n) .agent-glow { background: radial-gradient(circle, rgba(0, 229, 255, .32), transparent 65%); }
.agent-card:nth-child(3n) .agent-glow { background: radial-gradient(circle, rgba(255, 78, 205, .28), transparent 65%); }
.agent-card:hover .agent-glow { opacity: 1; }
.agent-card:hover { transform: translateY(-8px); border-color: rgba(124, 92, 255, .42); }

.agent-head { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; position: relative; }
.agent-no {
  font-family: var(--mono); font-size: 13px; font-weight: 700; letter-spacing: .05em;
  padding: 4px 10px; border-radius: 8px; color: var(--cyan);
  border: 1px solid rgba(0, 229, 255, .3); background: rgba(0, 229, 255, .07);
}
.agent-head h3 { font-size: 19.5px; font-weight: 700; }
.agent-desc { color: var(--text-2); font-size: 14.6px; line-height: 1.8; position: relative; }
.agent-list { list-style: none; margin: 18px 0 0; position: relative; }
.agent-list li { position: relative; padding-left: 20px; font-size: 13.8px; color: var(--text-3); margin-bottom: 9px; line-height: 1.65; }
.agent-list li::before {
  content: ""; position: absolute; left: 2px; top: 9px; width: 6px; height: 6px;
  border-radius: 2px; background: var(--grad); transform: rotate(45deg);
}
.agent-metric {
  margin-top: 22px; padding-top: 18px; border-top: 1px dashed var(--line);
  font-size: 13.5px; color: var(--text-2); position: relative;
}
.agent-metric b { color: var(--lime); font-weight: 600; margin-right: 8px; }

/* ---------------- Tabs ---------------- */
.tabs { border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--panel); backdrop-filter: blur(14px); overflow: hidden; }
.tab-nav { display: flex; flex-wrap: wrap; gap: 4px; padding: 16px; border-bottom: 1px solid var(--line); }
.tab-btn {
  position: relative; padding: 10px 20px; font-size: 14.5px; color: var(--text-2);
  border-radius: 99px; transition: color .3s, background .3s;
}
.tab-btn:hover { color: var(--text); background: rgba(255, 255, 255, .05); }
.tab-btn.active { color: #05060f; background: var(--grad); font-weight: 600; box-shadow: 0 10px 26px -12px rgba(0, 229, 255, .8); }

.tab-panels { padding: 34px 30px 38px; }
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeUp .5s cubic-bezier(.2, .8, .3, 1); }
@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

.panel-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.panel-item {
  padding: 22px 24px; border-radius: 14px; border: 1px solid var(--line);
  background: rgba(255, 255, 255, .028); transition: transform .3s, border-color .3s, background .3s;
}
.panel-item:hover { transform: translateX(5px); border-color: rgba(0, 229, 255, .35); background: rgba(0, 229, 255, .05); }
.panel-item h3 { font-size: 16px; font-weight: 650; margin-bottom: 7px; color: var(--text); }
.panel-item h3::before { content: "▸ "; color: var(--cyan); }
.panel-item p { font-size: 13.8px; color: var(--text-3); line-height: 1.7; }

/* ---------------- 架构 ---------------- */
.arch { display: flex; flex-direction: column; gap: 0; }
.arch-layer {
  display: flex; align-items: center; gap: 26px;
  padding: 20px 26px; border-radius: 16px;
  border: 1px solid var(--line); background: var(--panel);
  backdrop-filter: blur(12px); position: relative; overflow: hidden;
  transition: transform .35s, border-color .35s, background .35s;
}
.arch-layer::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--grad); opacity: .5; transition: opacity .35s;
}
.arch-layer:hover { transform: translateX(8px); border-color: rgba(0, 229, 255, .35); background: var(--panel-2); }
.arch-layer:hover::before { opacity: 1; }
.arch-side { display: flex; align-items: center; gap: 12px; min-width: 190px; }
.arch-idx {
  font-family: var(--mono); font-size: 12px; font-weight: 700; color: var(--cyan);
  padding: 3px 9px; border-radius: 7px; border: 1px solid rgba(0, 229, 255, .3); background: rgba(0, 229, 255, .07);
}
.arch-side h3 { font-size: 16.5px; font-weight: 650; white-space: nowrap; }
.arch-chips { display: flex; flex-wrap: wrap; gap: 9px; }
.arch-chips span {
  font-size: 13px; color: var(--text-2); padding: 6px 14px; border-radius: 9px;
  border: 1px solid var(--line); background: rgba(255, 255, 255, .035);
  transition: color .3s, border-color .3s;
}
.arch-chips span:hover { color: var(--cyan); border-color: rgba(0, 229, 255, .45); }

.arch-line { width: 1px; height: 22px; margin-left: 42px; background: linear-gradient(180deg, rgba(0, 229, 255, .45), rgba(124, 92, 255, .1)); position: relative; }
.arch-line::after {
  content: ""; position: absolute; left: -2.5px; bottom: -1px; width: 6px; height: 6px;
  border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan);
  animation: flowDot 2.4s linear infinite;
}
@keyframes flowDot { 0% { transform: translateY(-24px); opacity: 0; } 30% { opacity: 1; } 100% { transform: translateY(0); opacity: 0; } }

.arch-notes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 55px; }
.note-card {
  padding: 28px 26px; border-radius: var(--radius); border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(0, 229, 255, .06), rgba(124, 92, 255, .03));
  transition: transform .35s, border-color .35s;
}
.note-card:hover { transform: translateY(-5px); border-color: rgba(124, 92, 255, .4); }
.note-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.note-card p { font-size: 14.3px; color: var(--text-2); line-height: 1.8; }

/* ---------------- 流程 ---------------- */
.steps { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px 34px; }
.steps::before {
  content: ""; position: absolute; left: 7px; top: 12px; bottom: 12px; width: 1px;
  background: linear-gradient(180deg, rgba(0, 229, 255, .5), rgba(124, 92, 255, .25), transparent);
  display: none;
}
.step { position: relative; padding-left: 0; }
.step-dot {
  width: 14px; height: 14px; border-radius: 50%; margin-bottom: 18px;
  background: var(--grad); box-shadow: 0 0 0 5px rgba(0, 229, 255, .1), 0 0 20px rgba(0, 229, 255, .6);
  position: relative;
}
.step:hover .step-dot { animation: beat 1.4s ease-in-out infinite; }
@keyframes beat { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.28); } }

.step-body { padding: 26px 26px 28px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--panel); backdrop-filter: blur(12px); transition: transform .35s, border-color .35s; }
.step:hover .step-body { transform: translateY(-5px); border-color: rgba(0, 229, 255, .33); }
.step-week {
  display: inline-block; font-family: var(--mono); font-size: 11.5px; letter-spacing: .08em;
  color: var(--cyan); padding: 3px 10px; border-radius: 99px;
  background: rgba(0, 229, 255, .08); border: 1px solid rgba(0, 229, 255, .25); margin-bottom: 14px;
}
.step-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.step-body p { font-size: 14.2px; color: var(--text-2); line-height: 1.8; }

/* ---------------- 服务模式 ---------------- */
.plans { align-items: stretch; }
.plan {
  position: relative; display: flex; flex-direction: column;
  padding: 36px 32px; border-radius: var(--radius-lg);
  border: 1px solid var(--line); background: var(--panel); backdrop-filter: blur(14px);
  transition: transform .4s, border-color .4s, box-shadow .4s;
}
.plan:hover { transform: translateY(-6px); border-color: rgba(0, 229, 255, .3); }
.plan-featured {
  border-color: rgba(124, 92, 255, .5);
  background: linear-gradient(165deg, rgba(124, 92, 255, .12), rgba(0, 229, 255, .05));
  box-shadow: 0 30px 80px -40px rgba(124, 92, 255, .9);
}
.plan-badge {
  position: absolute; top: -13px; left: 32px; font-size: 12px; font-weight: 600;
  padding: 5px 14px; border-radius: 99px; color: #05060f; background: var(--grad);
  box-shadow: 0 8px 22px -10px rgba(0, 229, 255, .9);
}
.plan-name { font-size: 22px; font-weight: 750; margin-bottom: 8px; }
.plan-for { font-size: 13.5px; color: var(--text-3); margin-bottom: 24px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.plan-list { list-style: none; flex: 1; }
.plan-list li { position: relative; padding-left: 26px; font-size: 14.3px; color: var(--text-2); margin-bottom: 13px; line-height: 1.7; }
.plan-list li::before {
  content: ""; position: absolute; left: 0; top: 8px; width: 14px; height: 14px; border-radius: 50%;
  background: rgba(0, 229, 255, .14); border: 1px solid rgba(0, 229, 255, .45);
}
.plan-list li::after {
  content: ""; position: absolute; left: 4.5px; top: 11.5px; width: 5px; height: 2.5px;
  border-left: 1.5px solid var(--cyan); border-bottom: 1.5px solid var(--cyan); transform: rotate(-45deg);
}
.plan-foot { margin-top: 24px; padding-top: 20px; border-top: 1px dashed var(--line); font-size: 13.5px; color: var(--cyan); font-family: var(--mono); }
.plan-note { text-align: center; margin-top: 40px; font-size: 13.8px; color: var(--text-3); }

/* ---------------- 为什么 ---------------- */
.why-wrap { display: grid; grid-template-columns: 1.35fr .95fr; gap: 64px; align-items: start; }
.why-points { margin-top: 34px; display: flex; flex-direction: column; gap: 26px; }
.why-point { display: flex; gap: 20px; }
.why-idx {
  font-family: var(--mono); font-size: 14px; font-weight: 700; color: var(--cyan);
  flex-shrink: 0; padding-top: 3px;
}
.why-point h3 { font-size: 16.8px; font-weight: 650; margin-bottom: 8px; line-height: 1.55; }
.why-point p { font-size: 14.3px; color: var(--text-2); line-height: 1.8; }

.why-right { display: flex; flex-direction: column; gap: 22px; position: sticky; top: 110px; }
.quote-card {
  position: relative; padding: 38px 32px 32px; border-radius: var(--radius-lg);
  border: 1px solid rgba(124, 92, 255, .35);
  background: linear-gradient(160deg, rgba(124, 92, 255, .13), rgba(0, 229, 255, .04));
  backdrop-filter: blur(14px);
}
.quote-mark { font-size: 76px; line-height: .6; color: rgba(0, 229, 255, .35); font-family: Georgia, "Songti SC", serif; }
.quote-card p { margin-top: 14px; font-size: 16px; line-height: 1.85; color: var(--text); }
.quote-by { margin-top: 22px; font-size: 13px; color: var(--text-3); font-family: var(--mono); letter-spacing: .05em; }
.mini-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.mini-stat {
  padding: 22px 20px; border-radius: 14px; border: 1px solid var(--line); background: var(--panel);
  transition: border-color .3s, transform .3s;
}
.mini-stat:hover { border-color: rgba(0, 229, 255, .35); transform: translateY(-3px); }
.mini-stat b { display: block; font-size: 26px; font-weight: 800; font-family: var(--mono); background: var(--grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.mini-stat span { font-size: 12.8px; color: var(--text-3); }

/* ---------------- FAQ ---------------- */
.faq { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 26px 4px; font-size: 17px; font-weight: 600; text-align: left; color: var(--text);
  transition: color .3s;
}
.faq-q:hover { color: var(--cyan); }
.faq-icon { position: relative; flex-shrink: 0; width: 22px; height: 22px; border-radius: 50%; border: 1px solid var(--line-strong); transition: transform .35s, border-color .35s, background .35s; }
.faq-icon::before, .faq-icon::after {
  content: ""; position: absolute; left: 50%; top: 50%; background: var(--text-2); transform: translate(-50%, -50%);
  transition: background .3s;
}
.faq-icon::before { width: 10px; height: 1.5px; }
.faq-icon::after { width: 1.5px; height: 10px; }
.faq-item.open .faq-icon { transform: rotate(135deg); border-color: rgba(0, 229, 255, .6); background: rgba(0, 229, 255, .1); }
.faq-item.open .faq-icon::before, .faq-item.open .faq-icon::after { background: var(--cyan); }

.faq-a { max-height: 0; overflow: hidden; transition: max-height .45s cubic-bezier(.2, .8, .3, 1); }
.faq-a-inner { padding: 0 4px 28px; font-size: 15px; color: var(--text-2); line-height: 1.85; max-width: 800px; }

/* ---------------- 联系 ---------------- */
.contact { padding-bottom: 88px; }
.contact-card {
  position: relative; border-radius: 34px; overflow: hidden;
  border: 1px solid rgba(0, 229, 255, .22);
  background: linear-gradient(150deg, rgba(0, 229, 255, .07), rgba(124, 92, 255, .09) 50%, rgba(255, 78, 205, .05));
  backdrop-filter: blur(16px);
}
.contact-glow {
  position: absolute; width: 720px; height: 720px; border-radius: 50%; top: -380px; right: -180px;
  background: radial-gradient(circle, rgba(0, 229, 255, .22), transparent 62%);
  filter: blur(50px); animation: floatGlow 12s ease-in-out infinite;
}
@keyframes floatGlow { 0%, 100% { transform: translate(0, 0); } 50% { transform: translate(-40px, 40px); } }

.contact-inner { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; padding: 62px 58px; align-items: center; }
.contact-left h2 { font-size: clamp(24px, 2.8vw, 36px); line-height: 1.32; font-weight: 750; margin-bottom: 20px; }
.contact-left > p { color: var(--text-2); font-size: 15.6px; line-height: 1.85; max-width: 520px; }
.contact-actions { display: flex; gap: 14px; flex-wrap: wrap; margin: 34px 0 34px; }

/* ---------------- 微信通道 ----------------
   整行可点即复制；微信号明文常驻显示，即使复制失败也能手动输入。 */
.wx-bar {
  display: flex; align-items: center; gap: 12px;
  width: 100%; margin: 0; padding: 15px 20px;
  border-radius: 15px; cursor: pointer;
  border: 1px solid rgba(255, 255, 255, .13);
  background: rgba(255, 255, 255, .04);
  font-family: inherit; text-align: left;
  transition: border-color .28s, background .28s, transform .28s cubic-bezier(.2, .8, .3, 1);
}
.wx-bar:hover { border-color: rgba(0, 229, 255, .5); background: rgba(0, 229, 255, .07); transform: translateY(-2px); }
.wx-bar .wx-icon { flex: none; width: 20px; height: 20px; color: var(--cyan); }
.wx-bar .wx-label { flex: none; font-size: 13.4px; color: var(--text-3); }
.wx-bar .wx-id {
  flex: 1; min-width: 0;
  font-size: 15.5px; font-weight: 650; color: var(--text);
  letter-spacing: .02em; user-select: text;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.wx-bar .wx-copy {
  flex: none; padding: 6px 15px; border-radius: 99px;
  font-size: 12.4px; font-weight: 600; color: var(--cyan);
  border: 1px solid rgba(0, 229, 255, .38); background: rgba(0, 229, 255, .1);
  transition: color .25s, background .25s, border-color .25s;
}
.wx-bar.copied { border-color: rgba(0, 229, 255, .62); background: rgba(0, 229, 255, .1); }
.wx-bar.copied .wx-copy { color: #05060f; background: var(--grad); border-color: transparent; }
.wx-bar.copy-fail { border-color: rgba(255, 78, 205, .55); }
.wx-tip { flex: 1 1 100%; margin: 0; font-size: 12.7px; line-height: 1.7; color: var(--text-3); }

/* 窄屏收紧内距 */
@media (max-width: 620px) {
  .wx-bar { padding: 13px 16px; gap: 10px; }
}
/* 极窄屏：微信号换到独立一行。
   不能让它被省略号截断 —— 复制失败时用户需要看清并手动输入。 */
@media (max-width: 430px) {
  .wx-bar { flex-wrap: wrap; }
  .wx-bar .wx-copy { margin-left: auto; }
  .wx-bar .wx-id { flex: 1 1 100%; order: 3; font-size: 16px; }
}

.contact-meta { display: grid; gap: 12px; }
.contact-meta div { font-size: 14px; color: var(--text-2); }
.contact-meta b { display: inline-block; min-width: 88px; color: var(--text-3); font-weight: 500; font-size: 13.4px; }

.terminal {
  border-radius: 16px; overflow: hidden; border: 1px solid rgba(0, 229, 255, .22);
  background: rgba(3, 4, 12, .82); backdrop-filter: blur(12px);
  box-shadow: 0 30px 80px -40px rgba(0, 229, 255, .5);
}
.term-bar { display: flex; align-items: center; gap: 7px; padding: 13px 16px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .035); }
.term-bar i { width: 10px; height: 10px; border-radius: 50%; background: #ff5f57; }
.term-bar i:nth-child(2) { background: #febc2e; }
.term-bar i:nth-child(3) { background: #28c840; }
.term-bar span { margin-left: 10px; font-family: var(--mono); font-size: 11.5px; color: var(--text-3); }
.term-body {
  padding: 20px 18px; font-family: var(--mono); font-size: 12.8px; line-height: 1.95;
  color: var(--lime); white-space: pre-wrap; word-break: break-word; min-height: 292px;
}
.term-body .dim { color: var(--text-3); }
.term-body .cy { color: var(--cyan); }
.term-body .pk { color: var(--pink); }

/* ---------------- 页脚 ---------------- */
.footer { border-top: 1px solid var(--line); padding: 62px 0 30px; background: rgba(255, 255, 255, .012); }
.footer-inner { display: grid; grid-template-columns: 1.15fr 1fr; gap: 52px; padding-bottom: 44px; }
.footer-desc { margin-top: 18px; font-size: 13.8px; color: var(--text-3); max-width: 580px; line-height: 1.85; }
.footer-brand .logo-text em { font-size: 12px; letter-spacing: .03em; color: var(--text-2); }

/* 页脚公司信息（供检索与 AI 引擎提取事实） */
.footer-facts { margin-top: 24px; font-style: normal; }
.footer-facts dl { display: grid; grid-template-columns: auto 1fr; gap: 9px 20px; font-size: 13.4px; line-height: 1.7; }
.footer-facts dt { color: var(--text-3); white-space: nowrap; }
.footer-facts dd { color: var(--text-2); }
.footer-facts a { color: var(--text-2); transition: color .25s; }
.footer-facts a:hover { color: var(--cyan); }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.footer-col { display: flex; flex-direction: column; gap: 11px; }
.footer-col h3 { font-size: 13px; letter-spacing: .1em; color: var(--text); margin-bottom: 6px; text-transform: uppercase; }
.footer-col a, .footer-col span { font-size: 13.8px; color: var(--text-3); transition: color .25s; }
.footer-col a:hover { color: var(--cyan); }

/* 页脚微信：外观与同列条目一致，但可点击复制。
   选择器需写到 (0,3,0) 才能压过上面的 .footer-col span。 */
.footer-col .footer-wx {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 0; margin: 0; border: 0; background: none;
  font-family: inherit; font-size: 13.8px; color: var(--text-3);
  cursor: pointer; text-align: left; transition: color .25s;
}
.footer-col .footer-wx:hover { color: var(--cyan); }
.footer-col .footer-wx .footer-wx-tag {
  padding: 1px 8px; border-radius: 99px; font-size: 11.4px; line-height: 1.6;
  color: var(--cyan); border: 1px solid rgba(0, 229, 255, .32);
  transition: color .25s, background .25s, border-color .25s;
}
.footer-col .footer-wx.copied .footer-wx-tag { color: #05060f; background: var(--grad); border-color: transparent; }
.footer-bottom {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding-top: 26px; border-top: 1px solid var(--line);
  font-size: 12.8px; color: var(--text-3);
}
.icp-link {
  display: inline-flex; align-items: center; gap: 7px;
  color: var(--text-3); transition: color .25s;
}
.icp-link svg { opacity: .8; transition: opacity .25s, transform .25s; }
.icp-link:hover { color: var(--cyan); }
.icp-link:hover svg { opacity: 1; transform: scale(1.1); }

/* ---------------- 回到顶部 ---------------- */
.to-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center;
  color: var(--cyan); border: 1px solid rgba(0, 229, 255, .3);
  background: rgba(5, 6, 15, .8); backdrop-filter: blur(12px);
  opacity: 0; visibility: hidden; transform: translateY(14px);
  transition: opacity .35s, transform .35s, visibility .35s, box-shadow .35s;
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { box-shadow: 0 0 26px -4px rgba(0, 229, 255, .8); }

/* ---------------- 揭示动画 ---------------- */
/* 默认全部可见；仅当 JS 可用时才启用初始隐藏，避免脚本失效导致内容不可见 */
.reveal { transition: opacity .8s cubic-bezier(.2, .8, .3, 1), transform .8s cubic-bezier(.2, .8, .3, 1); }
.js .reveal { opacity: 0; transform: translateY(30px); }
.js .reveal.in { opacity: 1; transform: none; }

/* ---------------- 首屏入场（不依赖 JS / IntersectionObserver） ----------------
   首屏最大元素若先隐藏、再由 IO 淡入，LCP 会被推迟 1s 以上。
   这里改为纯 CSS 动画：样式表解析即开始，全程保持 opacity:1，
   既保留入场动效，又让 LCP 元素在第一帧就完成绘制。 */
.js .hero-badge,
.js .hero-title,
.js .hero-sub,
.js .hero-actions,
.js .hero-stats {
  animation: heroRise .62s cubic-bezier(.2, .8, .3, 1) backwards;
}
.js .hero-title   { animation-delay: .06s; }
.js .hero-sub     { animation-delay: .13s; }
.js .hero-actions { animation-delay: .20s; }
.js .hero-stats   { animation-delay: .27s; }
@keyframes heroRise {
  from { transform: translateY(24px); }
  to   { transform: translateY(0); }
}

/* ---------------- 响应式 ---------------- */
@media (max-width: 1080px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .why-wrap { grid-template-columns: 1fr; gap: 44px; }
  .why-right { position: static; }
  .arch-notes { grid-template-columns: 1fr; }
  .contact-inner { grid-template-columns: 1fr; gap: 42px; padding: 50px 40px; }
  .steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .nav-links {
    position: fixed; inset: 0 0 auto; top: 0; padding: 96px 24px 34px;
    flex-direction: column; align-items: stretch; gap: 6px;
    background: rgba(5, 6, 15, .97); backdrop-filter: blur(22px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-102%); transition: transform .45s cubic-bezier(.2, .8, .3, 1);
  }
  .nav-links.open { transform: none; }
  .nav-links > a:not(.btn) { padding: 14px 16px; font-size: 16px; border-radius: 12px; }
  .nav-cta { margin: 12px 0 0; }
  .nav-toggle { display: flex; z-index: 101; }

  .section { padding: 52px 0; }
  .sec-head { margin-bottom: 34px; }
  .hero { padding: 116px 0 60px; min-height: auto; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .panel-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
  .arch-layer { flex-direction: column; align-items: flex-start; gap: 14px; }
  .arch-line { margin-left: 42px; }
  .scroll-hint { display: none; }
  .hide-sm { display: none; }

  .eco-section { padding: 52px 0 64px; }
  .eco-wall { margin-top: 30px; padding: 18px 0 86px; perspective: none; }
  .eco-floor { height: 92px; }
  .eco-horizon { bottom: 82px; }
  .eco-horizon::after { width: 220px; height: 220px; }
  .eco-belts { transform: none; }
  .eco-belt { padding: 10px 0; }
  .eco-chip { padding: 9px 15px; font-size: 13px; margin-right: 10px; }
}

@media (max-width: 620px) {
  .section { padding: 46px 0; }
  .grid-3 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .mini-stats { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .contact-inner { padding: 38px 24px; }
  .hero-actions .btn { width: 100%; }
  .tab-panels { padding: 24px 18px 28px; }
  .tab-nav { padding: 12px; }
  .tab-btn { padding: 9px 15px; font-size: 13.5px; }
  .term-body { min-height: 240px; font-size: 11.8px; }
  .footer-bottom { flex-direction: column; gap: 10px; }

  .eco-desc { font-size: 14.5px; }
  .eco-metrics span { font-size: 12.5px; padding: 8px 15px; }
  .eco-metrics b { font-size: 15px; }
  .eco-chip { padding: 8px 13px; font-size: 12.5px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
  .reveal, .js .reveal { opacity: 1; transform: none; }
}