/* ============================================================
   囧次元 · jiongciyuangw.net
   视觉档位：第 6 档「霓虹灯管」
   底 夜巡墨紫 #0C0A14 / 主 电光青 #22D3EE / 辅 霓虹粉 #FF4FA3 / 点 荧光黄 #FFE066
   ============================================================ */

:root {
  --bg: #0C0A14;
  --bg2: #141020;
  --panel: #1B1630;
  --panel2: #221B3C;
  --line: #2E2745;

  --primary: #22D3EE;
  --primary-d: #0E7C93;
  --primary-l: #0F2A33;

  --aux: #FF4FA3;
  --aux-d: #B3226B;
  --aux-l: #35122A;

  --accent: #FFE066;

  --text: #E8E6F2;
  --text2: #A9A4C4;
  --text3: #8E88B0;

  --r: 18px;
  --r-s: 12px;
  --maxw: 1180px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.78;
  background-image:
    radial-gradient(900px 460px at 12% -6%, rgba(34, 211, 238, .13), transparent 68%),
    radial-gradient(760px 420px at 92% 4%, rgba(255, 79, 163, .11), transparent 68%);
  background-repeat: no-repeat;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--primary); text-decoration: none; }
a:hover { color: #7BE8F7; }

h1, h2, h3 { line-height: 1.3; margin: 0; font-weight: 800; letter-spacing: .2px; }

p { margin: 0; }

/* ---------- 通用容器 ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

.sect { padding: 58px 0; }
.sect--alt { background: var(--bg2); }

.sect h2 {
  font-size: 26px;
  position: relative;
  padding-bottom: 14px;
}
/* 霓虹灯管下划线 */
.sect h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 68px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary), var(--aux) 62%, transparent);
  box-shadow: 0 0 14px rgba(34, 211, 238, .55);
}

.sub { color: var(--text2); font-size: 15px; margin-top: 12px; max-width: 74ch; }

/* ---------- 入场动效：纯 CSS，无 JS 门控 ---------- */
@keyframes neonIn {
  from { opacity: 0; transform: translateY(12px); filter: blur(5px); }
  to   { opacity: 1; transform: none; filter: blur(0); }
}
.neon { animation: neonIn .58s cubic-bezier(.2, .7, .3, 1) both; }
.neon.d1 { animation-delay: .05s; }
.neon.d2 { animation-delay: .11s; }
.neon.d3 { animation-delay: .17s; }
.neon.d4 { animation-delay: .23s; }

@media (prefers-reduced-motion: reduce) {
  .neon { animation: none; opacity: 1; transform: none; filter: none; }
}

/* ---------- 顶栏 ---------- */
.top {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(12, 10, 20, .9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.top__in {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 11px 22px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand { display: flex; align-items: center; gap: 11px; color: var(--text); }
.brand img { width: 40px; height: 40px; flex: 0 0 40px; }
.brand__name { font-size: 19px; font-weight: 800; letter-spacing: 1px; }

.burger {
  margin-left: auto;
  display: none;
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 7px 12px;
  font-size: 14px;
  cursor: pointer;
}

.nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav a {
  color: var(--text2);
  font-size: 15px;
  padding: 8px 12px;
  border-radius: 10px;
  transition: color .18s, background .18s;
}
.nav a:hover { color: var(--text); background: rgba(255, 255, 255, .05); }
.nav a[aria-current="page"] {
  color: var(--primary);
  background: var(--primary-l);
  box-shadow: inset 0 0 0 1px rgba(34, 211, 238, .34);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  cursor: pointer;
  font-weight: 700;
  color: #16071A;
  background: linear-gradient(135deg, var(--aux), var(--primary) 92%);
  border-radius: 999px;
  padding: 13px 28px;
  font-size: 16px;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, .16), 0 10px 32px -12px rgba(255, 79, 163, .8);
  transition: transform .18s, box-shadow .18s;
}
.btn:hover { color: #16071A; transform: translateY(-2px); box-shadow: 0 0 0 1px rgba(255, 255, 255, .24), 0 16px 38px -12px rgba(34, 211, 238, .9); }

.btn--sm { padding: 8px 15px; font-size: 13px; white-space: nowrap; }
.btn--lg { padding: 15px 34px; font-size: 17px; }

/* ---------- Hero ---------- */
.hero { padding: 54px 0 46px; }

.hero__in {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 22px;
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  gap: 40px;
  align-items: center;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--primary);
  letter-spacing: .06em;
  border: 1px solid rgba(34, 211, 238, .34);
  background: var(--primary-l);
  border-radius: 999px;
  padding: 5px 14px 5px 11px;
  margin-bottom: 18px;
}
.kicker::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 9px var(--accent);
}

.hero h1 {
  font-size: 44px;
  letter-spacing: 1px;
  background: linear-gradient(100deg, #FFFFFF 26%, var(--primary) 68%, var(--aux));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead { color: var(--text2); font-size: 16.5px; margin-top: 18px; max-width: 58ch; }

.hero__cta { display: flex; align-items: center; gap: 16px; margin-top: 28px; flex-wrap: wrap; }

.hero__note { color: var(--text3); font-size: 13.5px; margin-top: 14px; }

.hero__shot { margin: 0 auto; max-width: 320px; }
.hero__shot img {
  width: 100%;
  height: auto;
  border-radius: 22px;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, .09),
    0 26px 60px -22px rgba(34, 211, 238, .55),
    0 0 70px -18px rgba(255, 79, 163, .5);
}

/* ---------- 事实条（霓虹刻度）---------- */
.rail {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
}

.rail__i { background: var(--panel); padding: 20px 16px; }

.tick {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--accent);
  border-left: 3px solid var(--primary);
  padding-left: 8px;
  margin-bottom: 9px;
}

.rail__i p { font-size: 14px; color: var(--text2); }
.rail__i b { display: block; color: var(--text); font-size: 15.5px; margin-bottom: 5px; }

/* ---------- 扫描带（渲染语言构件）---------- */
.scan {
  height: 34px;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 22px;
  max-width: var(--maxw);
  margin: 0 auto;
  background-image: repeating-linear-gradient(90deg,
    rgba(34, 211, 238, .34) 0 2px, transparent 2px 12px);
  background-size: 100% 9px;
  background-position: 0 center;
  background-repeat: no-repeat;
}
.scan__lb {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .26em;
  color: var(--text3);
  background: var(--bg);
  padding-right: 10px;
}

/* ---------- 卡片网格 ---------- */
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }

.card {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, .07);
  border-radius: var(--r);
  padding: 24px 22px;
  box-shadow: inset 0 0 30px -12px rgba(34, 211, 238, .42);
}
.card h3 { font-size: 17.5px; margin-bottom: 9px; }
.card p { color: var(--text2); font-size: 14.5px; }
.card__ic {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-l), var(--aux-l));
  border: 1px solid rgba(255, 255, 255, .1);
  margin-bottom: 13px;
}
.card__ic svg { width: 19px; height: 19px; stroke: var(--primary); fill: none; stroke-width: 1.7; }

.card--wide { padding: 28px 26px; }
.card--wide h3 { font-size: 19px; }

/* ---------- 预览栅格（交错两行）---------- */
.shots { display: flex; flex-direction: column; gap: 18px; }
.shots__row { display: grid; gap: 18px; }
.shots__row--a { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.shots__row--b { grid-template-columns: repeat(4, minmax(0, 1fr)); padding: 0 8.4%; }

.shot { margin: 0; }
.shot img {
  width: 100%;
  height: auto;
  border-radius: 16px;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, .08), 0 14px 34px -16px rgba(0, 0, 0, .85);
}
.shot figcaption { color: var(--text3); font-size: 13px; margin-top: 10px; text-align: center; }

/* ---------- 深度入口卡 ---------- */
.e {
  display: block;
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, .07);
  border-left: 4px solid var(--primary);
  border-radius: var(--r);
  padding: 22px 24px;
  color: var(--text);
  transition: transform .18s, box-shadow .18s, border-color .18s;
}
.e:hover {
  color: var(--text);
  transform: translateY(-3px);
  border-left-color: var(--aux);
  box-shadow: 0 16px 38px -18px rgba(255, 79, 163, .85);
}
.e em {
  display: inline-block;
  font-style: normal;
  font-size: 12px;
  font-family: var(--mono);
  letter-spacing: .14em;
  color: var(--aux);
  border: 1px solid rgba(255, 79, 163, .42);
  border-radius: 6px;
  padding: 2px 7px;
  margin-bottom: 10px;
}
.e b { display: block; font-size: 17px; margin-bottom: 7px; }
.e p { color: var(--text2); font-size: 14.5px; }

/* ---------- 评价 ---------- */
.quote {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, .07);
  border-radius: var(--r);
  padding: 24px 22px;
  box-shadow: inset 0 0 30px -12px rgba(255, 79, 163, .38);
}
.quote p { color: var(--text); font-size: 15px; }
.quote__w {
  display: block;
  margin-top: 14px;
  color: var(--text3);
  font-size: 13.5px;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}
.stars { color: var(--accent); letter-spacing: 3px; font-size: 14px; display: block; margin-bottom: 10px; }

.score {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 18px;
}
.score b { font-size: 40px; font-family: var(--mono); color: var(--primary); }
.score p { color: var(--text3); font-size: 13.5px; }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 12px; }
.faq details {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, .07);
  border-radius: var(--r-s);
  padding: 4px 20px;
}
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 14px 0;
  font-weight: 700;
  font-size: 15.5px;
  color: var(--text);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "＋"; float: right; color: var(--primary); font-weight: 700; }
.faq details[open] summary::after { content: "－"; }
.faq details[open] summary { color: var(--primary); }
.faq p { color: var(--text2); font-size: 14.5px; padding: 0 0 16px; }

/* ---------- CTA 通栏 ---------- */
.cta {
  background:
    radial-gradient(560px 260px at 18% 0%, rgba(34, 211, 238, .2), transparent 70%),
    radial-gradient(560px 260px at 84% 100%, rgba(255, 79, 163, .22), transparent 70%),
    var(--panel2);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 24px;
  padding: 40px 34px;
  text-align: center;
}
.cta h2 { font-size: 24px; }
.cta h2::after { left: 50%; transform: translateX(-50%); background: linear-gradient(90deg, var(--primary), var(--aux)); }
.cta .sub { margin: 14px auto 0; }
.cta .btn { margin-top: 24px; }

/* ---------- 内页 ---------- */
.page-hero {
  padding: 40px 0 34px;
  background:
    radial-gradient(620px 300px at 88% -10%, rgba(255, 79, 163, .17), transparent 70%),
    radial-gradient(520px 260px at 6% 0%, rgba(34, 211, 238, .15), transparent 70%),
    var(--bg2);
  border-bottom: 1px solid var(--line);
}
.page-hero h1 { font-size: 34px; }
.page-hero .lead { margin-top: 15px; }

.crumb { color: var(--text3); font-size: 13px; margin-bottom: 14px; }
.crumb a { color: var(--text3); }
.crumb a:hover { color: var(--primary); }

.doc {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 44px 22px 10px;
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.toc {
  position: sticky;
  top: 86px;
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, .07);
  border-radius: var(--r);
  padding: 18px 16px;
}
.toc p {
  font-size: 12.5px;
  font-family: var(--mono);
  letter-spacing: .16em;
  color: var(--text3);
  margin-bottom: 12px;
}
.toc a {
  display: block;
  color: var(--text2);
  font-size: 14px;
  padding: 7px 10px;
  border-radius: 8px;
  border-left: 2px solid transparent;
}
.toc a:hover { color: var(--primary); background: var(--primary-l); border-left-color: var(--primary); }

.prose { min-width: 0; }
.prose h2 { font-size: 22px; margin-top: 40px; }
.prose h2:first-child { margin-top: 0; }
.prose p { color: var(--text2); margin-top: 14px; }
.prose p b { color: var(--text); }
.prose a { text-decoration: underline; text-underline-offset: 3px; }

.block {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, .07);
  border-left: 3px solid var(--primary);
  border-radius: var(--r-s);
  padding: 18px 20px;
  margin-top: 20px;
  box-shadow: inset 0 0 30px -14px rgba(34, 211, 238, .5);
}
.block p { margin-top: 0; }

.steps { display: grid; gap: 14px; margin-top: 20px; }
.step {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 14px;
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, .07);
  border-radius: var(--r-s);
  padding: 18px 20px;
}
.step .tick { margin: 0; }
.step h3 { font-size: 16px; margin-bottom: 7px; }
.step p { color: var(--text2); font-size: 14.5px; }

.tbl-wrap { overflow-x: auto; margin-top: 20px; border: 1px solid var(--line); border-radius: var(--r-s); }
.tbl { width: 100%; border-collapse: collapse; min-width: 520px; }
.tbl th, .tbl td { padding: 12px 15px; text-align: left; font-size: 14.5px; border-bottom: 1px solid var(--line); }
.tbl th { background: var(--panel2); color: var(--primary); font-size: 13.5px; letter-spacing: .04em; }
.tbl td { color: var(--text2); }
.tbl tr:last-child td { border-bottom: 0; }

.prose ul { margin: 16px 0 0; padding-left: 0; list-style: none; }
.prose li { color: var(--text2); position: relative; padding-left: 20px; margin-bottom: 9px; }
.prose li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 11px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--aux);
  box-shadow: 0 0 8px rgba(255, 79, 163, .8);
}

/* ---------- 页脚 ---------- */
.foot { margin-top: 56px; background: var(--bg2); border-top: 1px solid var(--line); }

.foot__in {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 40px 22px 0;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 30px;
}
.foot__col h3 { font-size: 15px; margin-bottom: 13px; color: var(--text); }
.foot__col p { color: var(--text3); font-size: 14px; }
.foot__col a { display: block; color: var(--text2); font-size: 14px; padding: 5px 0; }
.foot__col a:hover { color: var(--primary); }

.foot__note {
  max-width: var(--maxw);
  margin: 28px auto 0;
  padding: 16px 22px 0;
  border-top: 1px solid var(--line);
  color: var(--text3);
  font-size: 13px;
}
.foot__cp {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 12px 22px 34px;
  color: var(--text3);
  font-size: 13px;
}

/* ============================================================
   ≤980px
   ============================================================ */
@media (max-width: 980px) {
  .hero__in { grid-template-columns: 1fr; gap: 32px; }
  .hero h1 { font-size: 34px; }

  .rail { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .shots__row--a { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .shots__row--b { grid-template-columns: repeat(3, minmax(0, 1fr)); padding: 0; }

  .doc { grid-template-columns: 1fr; gap: 26px; padding-top: 34px; }
  .toc { position: static; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
  .toc p { width: 100%; margin-bottom: 4px; }
  .toc a { border-left: 0; border-bottom: 2px solid transparent; padding: 5px 10px; }
  .toc a:hover { border-left-color: transparent; border-bottom-color: var(--primary); }

  .foot__in { grid-template-columns: 1fr 1fr; }
}

/* ============================================================
   ≤620px
   ============================================================ */
@media (max-width: 620px) {
  body { font-size: 15.5px; }

  .burger { display: block; }
  .nav {
    display: none;
    position: absolute;
    left: 12px;
    right: 12px;
    top: 62px;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--r);
    padding: 12px;
    margin-left: 0;
    box-shadow: 0 22px 44px -20px #000;
  }
  .burger[aria-expanded="true"] ~ .nav { display: flex; }
  .nav a { padding: 11px 13px; }
  .nav .btn { margin-top: 8px; }

  .hero { padding: 34px 0 30px; }
  .hero h1 { font-size: 29px; }
  .lead { font-size: 15.5px; }
  .hero__cta .btn { width: 100%; }
  .hero__note { text-align: center; }

  .sect { padding: 42px 0; }
  .sect h2 { font-size: 21px; }

  .rail { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid2, .grid3 { grid-template-columns: 1fr; }

  .shots__row--a, .shots__row--b { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .page-hero { padding: 28px 0 26px; }
  .page-hero h1 { font-size: 25px; }

  .prose h2 { font-size: 19.5px; }
  .step { grid-template-columns: 44px minmax(0, 1fr); padding: 16px 15px; }

  .cta { padding: 30px 20px; border-radius: 18px; }
  .cta h2 { font-size: 20px; }
  .cta .btn { width: 100%; }

  .foot__in { grid-template-columns: 1fr; gap: 22px; }
}