/* ============================================================
   聚鑫工作室 官方网站 —— 全站样式
   风格：深色科技控制台风（青色 × 紫色霓虹）
   ============================================================ */

:root {
  --bg0: #04060d;
  --bg1: #0a1122;
  --panel: rgba(15, 23, 42, 0.55);
  --line: rgba(96, 140, 255, 0.16);
  --line-strong: rgba(120, 180, 255, 0.35);
  --cyan: #22d3ee;
  --blue: #4f7cff;
  --purple: #a855f7;
  --green: #34d399;
  --amber: #fbbf24;
  --text: #e8f1ff;
  --muted: #93a7c9;
  --grad-main: linear-gradient(90deg, #22d3ee, #4f7cff 55%, #a855f7);
  --radius: 18px;
  --font: "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  --mono: Consolas, "JetBrains Mono", "Courier New", monospace;
}

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

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

body {
  font-family: var(--font);
  background: var(--bg0);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

::selection { background: rgba(34, 211, 238, 0.35); }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg0); }
::-webkit-scrollbar-thumb { background: #1c2b4d; border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: #2a3f6d; }

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
em, i { font-style: normal; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ---------- 背景装饰 ---------- */
.bg-grid {
  position: fixed; inset: 0; z-index: -2;
  background-image:
    linear-gradient(rgba(80, 140, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(80, 140, 255, 0.055) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 20%, #000 40%, transparent 100%);
}
.bg-glow {
  position: fixed; z-index: -1; width: 620px; height: 620px;
  border-radius: 50%; filter: blur(130px); opacity: 0.22; pointer-events: none;
  will-change: transform;
}
/* 背景光球缓缓漂移 + 呼吸缩放（移植自工作台 orb 背景） */
.glow-cyan { top: -180px; left: -140px; background: #0891b2; animation: drift 18s ease-in-out infinite alternate; }
.glow-purple { bottom: -220px; right: -160px; background: #7c3aed; animation: drift 24s ease-in-out infinite alternate-reverse; }
.glow-pink { top: 34%; left: 56%; width: 380px; height: 380px; background: #9d174d; opacity: 0.18; animation: drift 28s ease-in-out infinite alternate; }
@keyframes drift {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(60px, 40px) scale(1.15); }
}
/* CSS 星空层，缓缓明灭 */
.bg-stars {
  position: fixed; inset: 0; z-index: -2; pointer-events: none; opacity: 0.5;
  background-image:
    radial-gradient(1.5px 1.5px at 12% 24%, rgba(160,230,255,.75), transparent 55%),
    radial-gradient(1px 1px at 28% 68%, rgba(180,200,255,.6), transparent 55%),
    radial-gradient(1px 1px at 41% 15%, rgba(160,230,255,.55), transparent 55%),
    radial-gradient(2px 2px at 56% 38%, rgba(200,190,255,.65), transparent 55%),
    radial-gradient(1px 1px at 63% 82%, rgba(160,230,255,.5), transparent 55%),
    radial-gradient(1.5px 1.5px at 74% 12%, rgba(180,200,255,.6), transparent 55%),
    radial-gradient(1px 1px at 84% 55%, rgba(200,190,255,.55), transparent 55%),
    radial-gradient(1px 1px at 92% 88%, rgba(160,230,255,.5), transparent 55%),
    radial-gradient(1.5px 1.5px at 7% 88%, rgba(200,190,255,.55), transparent 55%),
    radial-gradient(1px 1px at 49% 60%, rgba(160,230,255,.4), transparent 55%),
    radial-gradient(1px 1px at 18% 44%, rgba(180,200,255,.5), transparent 55%),
    radial-gradient(1px 1px at 68% 70%, rgba(160,230,255,.4), transparent 55%);
  animation: twinkle 6s ease-in-out infinite alternate;
}
@keyframes twinkle { from { opacity: 0.25; } to { opacity: 0.6; } }
/* 尊重系统"减少动态效果"设置 */
@media (prefers-reduced-motion: reduce) {
  .bg-glow, .bg-stars { animation: none; }
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(5, 8, 16, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}
.header-inner { display: flex; align-items: center; gap: 28px; height: 74px; }

.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-mark {
  width: 42px; height: 42px; border-radius: 12px;
  display: grid; place-items: center; overflow: hidden;
  background: var(--grad-main);
  box-shadow: 0 0 22px rgba(34, 211, 238, 0.45);
}
.logo-mark img {
  width: 100%; height: 100%;
  display: block; object-fit: cover;
}
.logo-text { font-size: 17px; font-weight: 700; letter-spacing: 1px; line-height: 1.3; }
.logo-text em { display: block; font-size: 10px; letter-spacing: 2.5px; color: var(--muted); }

.main-nav { display: flex; gap: 6px; margin-left: auto; }
.main-nav a {
  padding: 8px 14px; border-radius: 10px;
  color: var(--muted); font-size: 14.5px; position: relative; transition: 0.25s;
}
.main-nav a:hover { color: var(--cyan); }
.main-nav a.active { color: var(--cyan); background: rgba(34, 211, 238, 0.08); }

.header-right { display: flex; align-items: center; gap: 16px; }
.live-clock { font-family: var(--mono); font-size: 14px; color: var(--cyan); letter-spacing: 1px; }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 1px solid var(--line-strong); border-radius: 8px;
  padding: 9px; cursor: pointer;
}
.nav-toggle span { width: 18px; height: 2px; background: var(--text); border-radius: 2px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: 999px; border: none;
  font-size: 15px; font-weight: 600; cursor: pointer; transition: 0.25s;
}
.btn-primary {
  background: linear-gradient(90deg, #22d3ee, #4f7cff);
  color: #04121a; font-weight: 700;
  box-shadow: 0 6px 24px rgba(34, 211, 238, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 32px rgba(34, 211, 238, 0.5); filter: brightness(1.08); }
.btn-ghost { border: 1px solid var(--line-strong); color: var(--text); background: transparent; }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); box-shadow: 0 0 18px rgba(34, 211, 238, 0.15); }
.btn-sm { padding: 9px 18px; font-size: 13.5px; }
.btn-block { width: 100%; }

/* ---------- 首屏 ---------- */
.hero { min-height: 100vh; display: flex; align-items: center; position: relative; padding: 130px 0 90px; }
.hero-inner { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: center; }

.hero-badge {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 7px 16px; border-radius: 999px;
  border: 1px solid rgba(34, 211, 238, 0.35);
  background: rgba(34, 211, 238, 0.07);
  color: var(--cyan); font-size: 13px; letter-spacing: 1px; margin-bottom: 26px;
}
.hero-badge i {
  width: 8px; height: 8px; border-radius: 50%; background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan); animation: pulse 1.8s infinite;
}
@keyframes pulse { 50% { opacity: 0.35; } }

.hero h1 { font-size: clamp(2.6rem, 5.5vw, 4rem); line-height: 1.15; letter-spacing: 2px; margin-bottom: 10px; }
.grad-cyan { background: linear-gradient(90deg, #67e8f9, #4f7cff); -webkit-background-clip: text; background-clip: text; color: transparent; }
.grad-purple { background: linear-gradient(90deg, #c084fc, #818cf8); -webkit-background-clip: text; background-clip: text; color: transparent; }

.hero-slogan { font-size: clamp(1.1rem, 2vw, 1.4rem); font-weight: 600; color: #cfe0ff; margin-bottom: 18px; }
.type-line { font-family: var(--mono); font-size: 15px; color: #7dd3fc; margin-bottom: 20px; min-height: 1.6em; }
.type-cursor { animation: blink 1s step-end infinite; color: var(--cyan); }
@keyframes blink { 50% { opacity: 0; } }

.hero-desc { color: var(--muted); font-size: 15.5px; max-width: 540px; margin-bottom: 32px; }

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 42px; }

.hero-stats { display: flex; gap: 48px; }
.hero-stats strong {
  display: block; font-size: 2.1rem; font-weight: 800; line-height: 1.2;
  background: var(--grad-main); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-stats span { font-size: 13px; color: var(--muted); }

/* 首屏右侧面板 */
.hero-panel { position: relative; padding: 10px 0; }
.panel-card {
  background: linear-gradient(165deg, rgba(19, 28, 52, 0.8), rgba(8, 12, 24, 0.9));
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.terminal-card { overflow: hidden; }
.panel-head {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px; border-bottom: 1px solid var(--line);
}
.panel-head em { margin-left: 10px; font-size: 12px; color: var(--muted); font-family: var(--mono); }
.dot { width: 11px; height: 11px; border-radius: 50%; }
.d-red { background: #f87171; } .d-yellow { background: #fbbf24; } .d-green { background: #34d399; }

.term-body {
  font-family: var(--mono); font-size: 13.5px; line-height: 2;
  padding: 20px 22px; color: #cbd8f0; white-space: pre; overflow-x: auto;
}
.t-prompt { color: var(--green); font-weight: 700; }
.t-ok { color: var(--green); }
.t-run { color: var(--amber); }
.t-info { color: #38bdf8; }
.hl { color: var(--cyan); font-weight: 700; }
.term-blink { animation: blink 1s step-end infinite; color: var(--cyan); }

.chip-card {
  margin-top: 18px; padding: 20px 24px;
  display: flex; align-items: center; gap: 18px; position: relative;
  border-color: rgba(168, 85, 247, 0.28);
}
.chip-visual {
  position: relative; width: 64px; height: 64px; flex-shrink: 0;
  border-radius: 10px;
  background: linear-gradient(150deg, #101b36, #0a1226);
  border: 1px solid rgba(34, 211, 238, 0.4);
  display: grid; place-items: center;
  box-shadow: inset 0 0 18px rgba(34, 211, 238, 0.12);
}
.chip-visual b {
  font-family: var(--mono); color: var(--cyan); font-size: 18px; letter-spacing: 1px;
  text-shadow: 0 0 12px rgba(34, 211, 238, 0.8);
}
.chip-visual span { position: absolute; width: 7px; height: 9px; background: var(--blue); border-radius: 2px; opacity: 0.85; }
.chip-visual span:nth-child(1) { left: -4px; top: 12px; }
.chip-visual span:nth-child(2) { left: -4px; bottom: 12px; }
.chip-visual span:nth-child(3) { right: -4px; top: 12px; }
.chip-visual span:nth-child(4) { right: -4px; bottom: 12px; }
.chip-info strong { display: block; font-size: 16px; }
.chip-info em { font-size: 12.5px; color: var(--muted); letter-spacing: 1px; }

.float-tag {
  position: absolute; padding: 9px 16px; border-radius: 12px;
  font-size: 13px; white-space: nowrap;
  animation: float 4s ease-in-out infinite alternate;
}
.tag-a { top: -22px; right: -6px; color: var(--amber); border-color: rgba(251, 191, 36, 0.35); }
.tag-b { bottom: -20px; left: -12px; color: var(--green); border-color: rgba(52, 211, 153, 0.35); animation-delay: 1.2s; }
@keyframes float { to { transform: translateY(-10px); } }

.scroll-hint {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  font-size: 11px; letter-spacing: 4px; color: var(--muted); text-align: center;
}
.scroll-hint span { display: block; width: 1px; height: 34px; margin: 8px auto 0; background: linear-gradient(180deg, var(--cyan), transparent); animation: drop 1.8s infinite; }
@keyframes drop { 0% { transform: scaleY(0); transform-origin: top; } 55% { transform: scaleY(1); } 100% { transform: scaleY(0); transform-origin: bottom; } }

/* ---------- 通用区块 ---------- */
.section { padding: 104px 0; position: relative; }

.sec-head { text-align: center; margin-bottom: 56px; }
.sec-head.left { text-align: left; margin-bottom: 28px; }
.sec-tag {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 12.5px; letter-spacing: 3px; color: var(--cyan); margin-bottom: 16px;
}
.sec-tag i { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }
.sec-head h2 { font-size: clamp(1.7rem, 3vw, 2.3rem); letter-spacing: 1px; margin-bottom: 10px; }
.sec-head p { color: var(--muted); font-size: 15px; }

/* 通用卡片 */
.card {
  background: linear-gradient(165deg, rgba(19, 28, 52, 0.72), rgba(8, 12, 24, 0.85));
  border: 1px solid var(--line); border-radius: var(--radius);
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(34, 211, 238, 0.45);
  box-shadow: 0 14px 44px rgba(34, 211, 238, 0.12);
}

/* ---------- 核心业务 ---------- */
.cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }

.service-card { padding: 30px 28px; }
.card-icon {
  width: 54px; height: 54px; border-radius: 14px;
  display: grid; place-items: center; margin-bottom: 20px;
}
.card-icon svg { width: 27px; height: 27px; }
.ci-cyan { background: rgba(34, 211, 238, 0.12); color: var(--cyan); border: 1px solid rgba(34, 211, 238, 0.3); }
.ci-blue { background: rgba(79, 124, 255, 0.12); color: #7ea1ff; border: 1px solid rgba(79, 124, 255, 0.3); }
.ci-purple { background: rgba(168, 85, 247, 0.12); color: #c084fc; border: 1px solid rgba(168, 85, 247, 0.3); }
.ci-green { background: rgba(52, 211, 153, 0.12); color: var(--green); border: 1px solid rgba(52, 211, 153, 0.3); }
.ci-amber { background: rgba(251, 191, 36, 0.12); color: var(--amber); border: 1px solid rgba(251, 191, 36, 0.3); }

.service-card h3 { font-size: 17.5px; margin-bottom: 2px; }
.card-en { display: block; font-size: 11px; letter-spacing: 2.5px; color: rgba(125, 211, 252, 0.55); margin: 4px 0 12px; font-family: var(--mono); }
.service-card p { color: var(--muted); font-size: 14px; }

/* ---------- 项目案例 ---------- */
.project-card { padding: 28px; }
.proj-status {
  display: flex; align-items: center; gap: 9px;
  font-size: 12px; letter-spacing: 2px; color: var(--cyan); margin-bottom: 16px;
}
.dot-live { width: 9px; height: 9px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); animation: pulse 1.6s infinite; }
.dot-live.green { background: var(--green); box-shadow: 0 0 10px var(--green); }
.project-card h3 { font-size: 16.5px; margin-bottom: 10px; }
.project-card p { color: var(--muted); font-size: 14px; margin-bottom: 18px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-row span {
  font-size: 12px; padding: 4px 13px; border-radius: 999px;
  border: 1px solid rgba(120, 180, 255, 0.25); color: #9cc3ff; background: rgba(79, 124, 255, 0.08);
}

/* ---------- 技术矩阵 ---------- */
.skill-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 18px; }
.skill-tile {
  padding: 26px 12px 20px; text-align: center;
  background: linear-gradient(165deg, rgba(19, 28, 52, 0.72), rgba(8, 12, 24, 0.85));
  border: 1px solid var(--line); border-radius: 16px; transition: 0.3s;
}
.skill-tile:hover { transform: translateY(-5px); border-color: rgba(34, 211, 238, 0.45); box-shadow: 0 12px 36px rgba(34, 211, 238, 0.12); }
.sk-ico {
  display: grid; place-items: center; width: 46px; height: 46px;
  margin: 0 auto 12px; border-radius: 12px;
  font-family: var(--mono); font-weight: 700; font-size: 15px;
}
.skill-tile:nth-child(4n + 1) .sk-ico { background: rgba(34, 211, 238, 0.12); color: var(--cyan); border: 1px solid rgba(34, 211, 238, 0.3); }
.skill-tile:nth-child(4n + 2) .sk-ico { background: rgba(79, 124, 255, 0.12); color: #7ea1ff; border: 1px solid rgba(79, 124, 255, 0.3); }
.skill-tile:nth-child(4n + 3) .sk-ico { background: rgba(168, 85, 247, 0.12); color: #c084fc; border: 1px solid rgba(168, 85, 247, 0.3); }
.skill-tile:nth-child(4n + 4) .sk-ico { background: rgba(52, 211, 153, 0.12); color: var(--green); border: 1px solid rgba(52, 211, 153, 0.3); }
.skill-tile span { display: block; font-size: 15px; font-weight: 600; }
.skill-tile em { display: block; font-size: 10px; letter-spacing: 2px; color: var(--muted); margin-top: 5px; font-family: var(--mono); }

/* 可点击的技术标签 */
.skill-tile.is-clickable { cursor: pointer; position: relative; }
.skill-tile.is-clickable:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }
.skill-tile.is-clickable::after {
  content: '↗'; position: absolute; top: 9px; right: 12px;
  font-size: 12px; color: var(--muted); opacity: 0.4; transition: 0.3s;
}
.skill-tile.is-clickable:hover::after { opacity: 1; color: var(--cyan); transform: translate(2px, -2px); }
.skill-tile .sk-hint {
  margin-top: 8px; font-size: 10.5px; font-weight: 400;
  letter-spacing: 0.5px; font-family: var(--mono);
  color: rgba(147, 167, 201, 0.55); transition: 0.3s;
}
.skill-tile.is-clickable:hover .sk-hint { color: var(--cyan); }
.sec-hint { color: var(--cyan); font-weight: 600; }

/* 更多工具入口 */
.skill-more { text-align: right; margin-top: 22px; }
.more-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 600; color: #7dd3fc;
  padding: 9px 18px; border-radius: 10px;
  border: 1px solid rgba(34, 211, 238, 0.28);
  background: rgba(34, 211, 238, 0.06);
  transition: 0.26s;
}
.more-link span { transition: transform 0.26s; }
.more-link:hover {
  color: #fff;
  border-color: rgba(34, 211, 238, 0.65);
  background: rgba(34, 211, 238, 0.14);
  box-shadow: 0 8px 26px rgba(34, 211, 238, 0.16);
}
.more-link:hover span { transform: translateX(4px); }

/* ---------- 关于我们 ---------- */
.about-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 64px; align-items: center; }
.about-text { color: var(--muted); font-size: 15px; margin-bottom: 24px; }
.about-list li { color: #c6d6f2; font-size: 15px; padding: 10px 0; }
.timeline {
  border-left: 2px solid rgba(80, 140, 255, 0.25);
  padding: 10px 0 10px 32px; position: relative;
}
.tl-item { position: relative; margin-bottom: 30px; }
.tl-item:last-child { margin-bottom: 0; }
.tl-item::before {
  content: ""; position: absolute; left: -40px; top: 6px;
  width: 13px; height: 13px; border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--purple));
  box-shadow: 0 0 14px rgba(34, 211, 238, 0.6);
}
.tl-item strong { font-family: var(--mono); font-size: 17px; color: var(--cyan); }
.tl-item p { color: var(--muted); font-size: 14px; margin-top: 2px; }

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
.contact-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.contact-card { padding: 24px 22px; }
.contact-card span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.contact-card strong { display: block; font-size: 16.5px; color: #dbeafe; letter-spacing: 0.5px; }
.contact-card strong a { transition: color 0.25s; }
.contact-card strong a:hover { color: var(--cyan); }
.contact-card em { display: block; font-size: 12px; color: rgba(147, 167, 201, 0.7); margin-top: 6px; }

.contact-form { padding: 30px; }
.contact-form h3 { font-size: 17px; margin-bottom: 20px; }
.contact-form input,
.contact-form textarea {
  width: 100%; margin-bottom: 14px;
  background: rgba(8, 14, 28, 0.65); border: 1px solid rgba(90, 140, 255, 0.22);
  border-radius: 10px; padding: 13px 15px;
  color: var(--text); font-family: var(--font); font-size: 14px;
  transition: 0.25s; resize: vertical;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: rgba(147, 167, 201, 0.55); }
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none; border-color: rgba(34, 211, 238, 0.6);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.12);
}
.form-tip { font-size: 12px; color: var(--muted); margin-top: 12px; text-align: center; transition: color 0.25s; }
.form-tip.is-error { color: #fb7185; }
.form-tip.is-ok { color: var(--green); }
.contact-form .btn:disabled { opacity: 0.6; cursor: not-allowed; }
.contact-form input.is-invalid,
.contact-form textarea.is-invalid { border-color: rgba(251, 113, 133, 0.7); }
/* 蜜罐字段：真人看不见，机器人会填 */
.hp-field { position: absolute !important; left: -9999px !important; width: 1px !important; height: 1px !important; opacity: 0; pointer-events: none; }

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 46px 0 30px; margin-top: 40px; }
.footer-inner { text-align: center; }
.f-logo { font-size: 19px; font-weight: 700; letter-spacing: 2px; }
.f-logo em { display: block; font-size: 10.5px; letter-spacing: 4px; color: var(--muted); margin-top: 4px; }
.f-nav { margin: 20px 0; display: flex; justify-content: center; gap: 26px; flex-wrap: wrap; }
.f-nav a { color: var(--muted); font-size: 13.5px; transition: 0.25s; }
.f-nav a:hover { color: var(--cyan); }
.copyright { font-size: 12.5px; color: rgba(147, 167, 201, 0.6); }

/* ---------- 回到顶部 ---------- */
.back-top {
  position: fixed; right: 28px; bottom: 28px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.2), rgba(79, 124, 255, 0.2));
  border: 1px solid var(--line-strong); color: var(--cyan);
  font-size: 19px; cursor: pointer;
  opacity: 0; pointer-events: none; transform: translateY(14px);
  transition: 0.3s;
}
.back-top.show { opacity: 1; pointer-events: auto; transform: none; }
.back-top:hover { box-shadow: 0 0 22px rgba(34, 211, 238, 0.35); }

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }
.cards-grid .reveal:nth-child(2), .skill-grid .reveal:nth-child(4n + 2) { transition-delay: 0.08s; }
.cards-grid .reveal:nth-child(3), .skill-grid .reveal:nth-child(4n + 3) { transition-delay: 0.16s; }
.cards-grid .reveal:nth-child(4), .skill-grid .reveal:nth-child(4n + 4) { transition-delay: 0.24s; }

/* ---------- 工具箱弹窗 ---------- */
.toolbox-modal { position: fixed; inset: 0; z-index: 300; display: none; }
.toolbox-modal.open { display: block; }
.tm-backdrop {
  position: absolute; inset: 0;
  background: rgba(2, 4, 10, 0.78);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  animation: tmFade 0.25s ease;
}
.tm-panel {
  position: relative; z-index: 1;
  width: min(920px, calc(100% - 40px));
  max-height: min(86vh, 780px);
  margin: 7vh auto 0;
  display: flex; flex-direction: column;
  background: linear-gradient(165deg, #0d1526, #070b16);
  border: 1px solid rgba(96, 140, 255, 0.28);
  border-radius: 20px;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.7);
  overflow: hidden;
  animation: tmUp 0.34s cubic-bezier(0.2, 0.8, 0.3, 1);
}
.tm-panel:focus { outline: none; }
@keyframes tmFade { from { opacity: 0; } }
@keyframes tmUp { from { opacity: 0; transform: translateY(24px) scale(0.985); } }

.tm-head {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 16px;
  padding: 22px 26px 18px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(34, 211, 238, 0.05), transparent);
}
.tm-head h3 { font-size: 20px; letter-spacing: 1px; }
.tm-head p {
  font-size: 11px; letter-spacing: 1.5px; color: var(--muted);
  font-family: var(--mono); margin-top: 5px;
}
.tm-close {
  width: 34px; height: 34px; flex: 0 0 auto;
  display: grid; place-items: center;
  border-radius: 10px; font-size: 14px;
  color: var(--muted);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
  transition: 0.25s;
}
.tm-close:hover { color: #fff; border-color: rgba(251, 113, 133, 0.6); background: rgba(251, 113, 133, 0.12); }

.tm-body { flex: 1; overflow-y: auto; padding: 22px 26px 6px; }
.tm-body::-webkit-scrollbar { width: 8px; }
.tm-body::-webkit-scrollbar-thumb { background: #1c2b4d; border-radius: 4px; }

.tm-group { margin-bottom: 24px; }
/* 分类配色（不用 color-mix，兼容旧内核 / 微信浏览器） */
.tm-c-cyan   { --c: #22d3ee; --cb: rgba(34, 211, 238, 0.12); --cl: rgba(34, 211, 238, 0.32); --ch: rgba(34, 211, 238, 0.5); --cf: rgba(34, 211, 238, 0.07); }
.tm-c-blue   { --c: #7ea1ff; --cb: rgba(79, 124, 255, 0.14); --cl: rgba(79, 124, 255, 0.34); --ch: rgba(79, 124, 255, 0.52); --cf: rgba(79, 124, 255, 0.08); }
.tm-c-purple { --c: #c084fc; --cb: rgba(168, 85, 247, 0.14); --cl: rgba(168, 85, 247, 0.34); --ch: rgba(168, 85, 247, 0.52); --cf: rgba(168, 85, 247, 0.08); }
.tm-c-green  { --c: #34d399; --cb: rgba(52, 211, 153, 0.12); --cl: rgba(52, 211, 153, 0.32); --ch: rgba(52, 211, 153, 0.5); --cf: rgba(52, 211, 153, 0.07); }
.tm-c-amber  { --c: #fbbf24; --cb: rgba(251, 191, 36, 0.12); --cl: rgba(251, 191, 36, 0.32); --ch: rgba(251, 191, 36, 0.5); --cf: rgba(251, 191, 36, 0.07); }
.tm-c-pink   { --c: #f472b6; --cb: rgba(244, 114, 182, 0.12); --cl: rgba(244, 114, 182, 0.32); --ch: rgba(244, 114, 182, 0.5); --cf: rgba(244, 114, 182, 0.07); }

.tm-cat {
  display: flex; align-items: center; gap: 9px;
  font-size: 13px; font-weight: 600; letter-spacing: 1px;
  color: var(--c); margin-bottom: 12px;
}
.tm-cat i {
  width: 24px; height: 24px; display: grid; place-items: center;
  border-radius: 7px; font-size: 12px;
  background: var(--cb); border: 1px solid var(--cl);
}
.tm-links { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.tm-link {
  display: flex; align-items: center; gap: 11px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.018);
  transition: 0.24s;
}
.tm-link:hover {
  transform: translateY(-2px);
  border-color: var(--ch);
  background: var(--cf);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}
.tm-ico {
  width: 30px; height: 30px; flex: 0 0 auto;
  display: grid; place-items: center;
  border-radius: 8px; font-size: 12px;
  color: var(--c);
  background: var(--cb);
  border: 1px solid var(--cl);
}
.tm-txt { min-width: 0; }
.tm-txt b { display: block; font-size: 13.5px; color: #dbeafe; font-weight: 600; }
.tm-txt em {
  display: block; font-size: 11.5px; color: rgba(147, 167, 201, 0.8);
  margin-top: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.tm-arrow {
  margin-left: auto; font-size: 13px; color: var(--c);
  opacity: 0; transform: translateX(-4px); transition: 0.24s;
}
.tm-link:hover .tm-arrow { opacity: 1; transform: none; }

.tm-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 14px 26px;
  border-top: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.25);
  font-size: 12.5px; color: var(--muted);
}
.tm-foot .btn-sm { padding: 8px 16px; font-size: 13px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-panel { max-width: 560px; }
  .tag-a { right: 10px; }
  .about-grid { grid-template-columns: 1fr; gap: 44px; }
}
@media (max-width: 960px) {
  .main-nav {
    position: fixed; top: 74px; left: 0; right: 0;
    flex-direction: column; gap: 4px; padding: 18px 24px 24px;
    background: rgba(5, 8, 16, 0.96); border-bottom: 1px solid var(--line);
    backdrop-filter: blur(14px);
    display: none;
  }
  .main-nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .live-clock { display: none; }
}
@media (max-width: 640px) {
  .section { padding: 76px 0; }
  .hero { padding-top: 110px; }
  .hero-stats { gap: 28px; }
  .hero-stats strong { font-size: 1.7rem; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-cards { grid-template-columns: 1fr; }
  .float-tag { display: none; }
  .term-body { font-size: 12px; }

  /* 工具箱弹窗：手机上铺满 */
  .tm-panel {
    width: 100%; max-height: 92vh;
    margin: 0; border-radius: 18px 18px 0 0;
    position: absolute; bottom: 0; left: 0; right: 0;
  }
  .tm-head { padding: 18px 18px 14px; }
  .tm-body { padding: 18px 18px 4px; }
  .tm-links { grid-template-columns: 1fr; }
  .tm-foot { padding: 12px 18px; flex-wrap: wrap; }
  .skill-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 12px; }
  .skill-tile { padding: 20px 10px 16px; }
}

/* ---------- 减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}

/* 备案号（静态元素，不进 CMS：cms.js 用 textContent 回填，塞不进链接） */
.icp { font-size: 12.5px; margin-top: 6px; }
.icp a { color: var(--muted); text-decoration: none; transition: 0.25s; }
.icp a:hover { color: #fff; text-decoration: underline; }