/* =========================================================
   经典指南 · 共享样式 /assets/site.css
   ========================================================= */

/* 1. reset */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
b, strong { font-weight: 700; }

/* 2. tokens */
:root {
  --ink-900: #070B18;
  --ink-800: #0E1730;
  --ink-750: #101B39;
  --line: #1E3550;
  --line-soft: rgba(30, 53, 80, .6);
  --cyan: #22E0D6;
  --gold: #E9B45C;
  --magenta: #FF3D8B;
  --violet: #7A2BFF;
  --paper: #F4F7FB;
  --mist: #9AA7BE;
  --green: #4CD98A;
  --amber: #FFB44D;

  --rail-w: 88px;
  --cmd-h: 56px;
  --mob-h: 62px;
  --cut-sm: 14px;
  --cut-lg: 22px;
  --ease: 180ms cubic-bezier(.22, .68, .28, 1);
  --maxw: 1320px;

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, "Noto Sans Mono", ui-monospace, monospace;
}

/* 3. base */
html { scroll-behavior: smooth; }
body {
  background-color: var(--ink-900);
  background-image:
    radial-gradient(900px 520px at 78% -6%, rgba(122, 43, 255, .16), transparent 62%),
    radial-gradient(680px 420px at 4% 8%, rgba(34, 224, 214, .09), transparent 60%),
    linear-gradient(rgba(34, 224, 214, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 224, 214, .035) 1px, transparent 1px);
  background-size: auto, auto, 96px 96px, 96px 96px;
  background-attachment: fixed;
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: clamp(16px, 1.02vw, 17.5px);
  line-height: 1.8;
  font-weight: 400;
  overflow-x: hidden;
}
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }
::selection { background: var(--cyan); color: var(--ink-900); }

#main-content { display: block; }
@media (min-width: 1024px) { #main-content { margin-left: var(--rail-w); } }

/* 4. 排版 */
.display {
  font-size: clamp(42px, 8.6vw, 120px);
  font-weight: 300;
  line-height: .98;
  letter-spacing: -.02em;
  color: var(--paper);
}
.lede {
  font-size: clamp(17px, 1.35vw, 20px);
  line-height: 1.75;
  color: var(--paper);
  max-width: 46ch;
}
.prose { color: var(--paper); }
.prose p { max-width: 68ch; margin-bottom: 1.1em; }
.prose p:last-child { margin-bottom: 0; }
.prose a { color: var(--cyan); border-bottom: 1px solid rgba(34, 224, 214, .45); }
.mono {
  font-family: var(--font-mono);
  font-size: .82em;
  letter-spacing: .04em;
  color: var(--mist);
}
.mono-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--gold);
  white-space: nowrap;
}
.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;
}

/* 5. 布局 */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 56px);
}
.grid { display: grid; gap: clamp(20px, 2.6vw, 40px); }
.grid--tight { gap: clamp(12px, 1.4vw, 20px); }
.grid--7-5 { grid-template-columns: 7fr 5fr; }
.grid--cards { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
@media (max-width: 900px) { .grid--7-5 { grid-template-columns: 1fr; } }

.sec-head { display: flex; flex-direction: column; gap: 10px; margin-bottom: clamp(22px, 3vw, 40px); }
.sec-head__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
}
.sec-head__title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 900;
  letter-spacing: -.01em;
  line-height: 1.12;
}
.sec-head__note { color: var(--mist); font-size: 15px; max-width: 60ch; }

.crumbs { font-family: var(--font-mono); font-size: 12px; letter-spacing: .06em; color: var(--mist); }
.crumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.crumbs li { display: flex; align-items: center; gap: 8px; }
.crumbs li + li::before { content: "/"; color: var(--line); }
.crumbs a:hover { color: var(--cyan); }
.crumbs [aria-current="page"] { color: var(--paper); }

.stat-strip { display: flex; flex-wrap: wrap; gap: clamp(18px, 3vw, 48px); }
.stat { border-left: 2px solid var(--line); padding-left: 14px; }
.stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.6vw, 32px);
  letter-spacing: .02em;
  color: var(--cyan);
  line-height: 1.2;
}
.stat__label { font-size: 13px; color: var(--mist); }

/* 6. 切角面板与图片容器 */
.panel {
  --cut: var(--cut-sm);
  --panel-bg: var(--ink-800);
  --panel-edge: var(--line);
  position: relative;
  padding: clamp(18px, 2.4vw, 30px);
  border: 1px solid transparent;
  background:
    linear-gradient(var(--panel-bg), var(--panel-bg)) padding-box,
    linear-gradient(var(--panel-edge), var(--panel-edge)) border-box;
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}
.panel--lg { --cut: var(--cut-lg); }
.panel--accent { --panel-edge: rgba(34, 224, 214, .5); }
.panel--stack { margin-top: -24px; }

.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(34, 224, 214, .08), transparent 55%),
    var(--ink-750);
  border: 1px solid var(--line);
  clip-path: polygon(var(--cut-sm) 0, 100% 0, 100% calc(100% - var(--cut-sm)), calc(100% - var(--cut-sm)) 100%, 0 100%, 0 var(--cut-sm));
}
.media-frame img { width: 100%; height: 100%; object-fit: cover; }
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame__cap {
  position: absolute; left: 0; bottom: 0;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--paper);
  background: linear-gradient(90deg, rgba(7, 11, 24, .92), rgba(7, 11, 24, 0));
}

/* 7. 按钮 / 标签 / 印章 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  font-size: 14px;
  letter-spacing: .04em;
  border: 1px solid var(--line);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: background var(--ease), color var(--ease), border-color var(--ease);
}
.btn:focus-visible { outline: none; box-shadow: inset 0 0 0 2px var(--cyan); }
.btn--primary { background: var(--cyan); color: var(--ink-900); font-weight: 700; border-color: var(--cyan); }
.btn--primary:hover { background: #5BF0E7; border-color: #5BF0E7; }
.btn--ghost { background: transparent; color: var(--paper); border-color: var(--line); }
.btn--ghost:hover { color: var(--cyan); border-color: var(--cyan); }
.btn--rail { writing-mode: vertical-rl; text-orientation: upright; padding: 16px 10px; font-size: 12.5px; letter-spacing: .16em; }

.chip {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--ink-900);
  background: var(--gold);
  clip-path: polygon(7px 0, 100% 0, 100% 100%, 0 100%, 0 7px);
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
  border: 1px solid var(--line);
  background: transparent;
  transition: color var(--ease), border-color var(--ease), background var(--ease);
}
.tag:hover { color: var(--paper); border-color: var(--cyan); }
.tag[aria-pressed="true"] { color: var(--cyan); border-color: var(--cyan); background: rgba(34, 224, 214, .08); }
.tag:focus-visible { outline: none; box-shadow: inset 0 0 0 2px var(--cyan); }

.seal-mark {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  padding: 4px;
  border: 1px solid var(--gold);
  outline: 1px dashed rgba(233, 180, 92, .35);
  outline-offset: -6px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: .08em;
  text-align: center;
}
.seal-mark__line { display: block; }
.seal-mark--lg { width: 70px; height: 70px; font-size: 16px; }

/* 8. 头部 */
.site-head { position: sticky; top: 0; z-index: 90; }
@media (min-width: 1024px) { .site-head { margin-left: var(--rail-w); } }

.skip-link {
  position: fixed;
  top: 10px; left: 10px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--cyan);
  color: var(--ink-900);
  font-size: 13px;
  font-weight: 700;
  transform: translateY(-180%);
  transition: transform var(--ease);
}
.skip-link:focus { transform: translateY(0); }

.rail {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--rail-w);
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 0 14px;
  background-color: var(--ink-800);
  background-image:
    linear-gradient(rgba(34, 224, 214, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 224, 214, .05) 1px, transparent 1px);
  background-size: 22px 22px;
  border-right: 1px solid var(--line);
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: none;
}
.rail::-webkit-scrollbar { width: 0; height: 0; }

.rail__progress {
  position: absolute;
  top: 0; right: 0;
  width: 2px;
  height: 100%;
  transform: scaleY(0);
  transform-origin: top center;
  background: linear-gradient(180deg, var(--cyan), var(--violet), var(--magenta));
}

.rail__brand { display: flex; flex-direction: column; align-items: center; gap: 8px; padding-top: 4px; }
.rail__brand-cn {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: 19px;
  font-weight: 900;
  letter-spacing: .22em;
  color: var(--paper);
}
.rail__brand-en {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--gold);
}

.rail__nav { flex: 0 1 auto; }
.rail__list { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.rail__link {
  position: relative;
  display: block;
  padding: 26px 6px 14px;
  color: var(--mist);
  transition: color var(--ease);
}
.rail__idx {
  position: absolute;
  top: 7px; left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .06em;
  color: var(--gold);
}
.rail__lbl {
  display: block;
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: 13.5px;
  letter-spacing: .2em;
}
.rail__link::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 2px;
  width: 0; height: 2px;
  background: var(--gold);
  transform: translateX(-50%);
  transition: width var(--ease);
}
.rail__link:hover { color: var(--paper); }
.rail__link:hover::after { width: 20px; }
.rail__link[aria-current="page"],
.rail__link[aria-current="page"] .rail__lbl { color: var(--cyan); }
.rail__link[aria-current="page"]::after { width: 28px; background: var(--cyan); }

.rail__actions { display: flex; flex-direction: column; align-items: center; gap: 8px; padding-bottom: 6px; }

/* 指挥条（桌面） */
.cmdbar { display: none; }
@media (min-width: 1024px) {
  .cmdbar {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    height: var(--cmd-h);
    padding-inline: clamp(20px, 3vw, 44px);
    background: rgba(7, 11, 24, .9);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
  }
  .cmdbar::after {
    content: "";
    position: absolute;
    left: 0; bottom: -1px;
    width: 140px; height: 1px;
    background: linear-gradient(90deg, var(--cyan), transparent);
  }
}
.cmdbar__notice {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--mist);
  letter-spacing: .02em;
}
.cmdbar__util { display: flex; align-items: center; gap: 22px; font-size: 13px; color: var(--mist); }
.cmdbar__util a:hover { color: var(--cyan); }

/* 移动状态栏 */
.mobbar {
  position: relative;
  z-index: 110;
  display: flex;
  align-items: center;
  gap: 12px;
  height: var(--mob-h);
  padding-inline: 16px;
  background: rgba(7, 11, 24, .95);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.mobbar__brand { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.mobbar__cn { font-size: 15px; font-weight: 900; letter-spacing: .06em; line-height: 1.25; }
.mobbar__sub {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: .06em;
  color: var(--mist);
  white-space: nowrap;
}
.mobbar__notice {
  margin-left: auto;
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .04em;
  color: var(--gold);
  border: 1px solid var(--line);
  white-space: nowrap;
}
.mobbar__progress {
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--cyan), var(--gold) 55%, var(--magenta));
}
@media (max-width: 399px) { .mobbar__notice { display: none; } }

.nav-toggle {
  position: relative;
  z-index: 120;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 11px;
  border: 1px solid var(--line);
  color: var(--paper);
  font-size: 12px;
  letter-spacing: .12em;
  transition: border-color var(--ease), color var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle__bars { position: relative; display: block; width: 18px; height: 12px; }
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px; height: 2px;
  background: currentColor;
  transition: top var(--ease), bottom var(--ease), transform var(--ease);
}
.nav-toggle__bars::before { top: 1px; }
.nav-toggle__bars::after { bottom: 1px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 5px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { bottom: 5px; transform: rotate(-45deg); }
@media (min-width: 1024px) {
  .mobbar { display: none; }
  .nav-toggle { display: none; }
}

.nav-scrim { display: none; }

html.nav-open { overflow: hidden; }

/* 9. 移动抽屉 */
@media (max-width: 1023px) {
  .rail {
    inset: 0 auto 0 0;
    width: min(86vw, 340px);
    align-items: stretch;
    justify-content: flex-start;
    gap: 20px;
    padding: calc(var(--mob-h) + 18px) 20px 32px;
    transform: translateX(-102%);
    transition: transform 220ms cubic-bezier(.22, .68, .28, 1);
    box-shadow: 26px 0 70px -34px rgba(0, 0, 0, .95);
    background-size: 28px 28px;
  }
  .site-head[data-open] .rail { transform: none; }

  .rail__progress { display: none; }
  .rail__brand { display: none; }

  .rail__list { align-items: stretch; gap: 0; }
  .rail__link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 15px 4px;
    border-bottom: 1px solid var(--line-soft);
  }
  .rail__idx { position: static; transform: none; font-size: 11px; }
  .rail__lbl { writing-mode: horizontal-tb; text-orientation: initial; font-size: 16px; letter-spacing: .1em; }
  .rail__link::after { left: 0; bottom: -1px; transform: none; }
  .rail__link:hover::after { width: 40px; }
  .rail__link[aria-current="page"]::after { width: 52px; }

  .rail__actions { align-items: stretch; margin-top: 4px; padding-bottom: 0; }
  .btn--rail {
    writing-mode: horizontal-tb;
    text-orientation: initial;
    width: 100%;
    padding: 14px 16px;
    font-size: 14px;
    letter-spacing: .08em;
  }
  .seal-mark { align-self: flex-start; }

  .nav-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 95;
    background: rgba(4, 7, 15, .74);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--ease);
  }
  .site-head[data-open] .nav-scrim { opacity: 1; pointer-events: auto; }
}

/* 10. 页脚 */
.site-foot {
  position: relative;
  margin-top: clamp(56px, 8vw, 120px);
  background:
    linear-gradient(180deg, rgba(14, 23, 48, .2), var(--ink-800) 40%),
    var(--ink-800);
  border-top: 1px solid var(--line);
  color: var(--paper);
}
@media (min-width: 1024px) { .site-foot { margin-left: var(--rail-w); } }

.foot-scan {
  display: block;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan) 22%, var(--gold) 52%, var(--magenta) 78%, transparent);
  opacity: .8;
}

.foot-top {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr 1fr 1.45fr;
  gap: clamp(24px, 3vw, 48px);
  padding: clamp(38px, 5vw, 72px) clamp(18px, 4vw, 56px) clamp(26px, 3vw, 44px);
  max-width: var(--maxw);
  margin-inline: auto;
}
@media (max-width: 1150px) { .foot-top { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 860px) { .foot-top { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .foot-top { grid-template-columns: 1fr; } }

.foot-brand { display: flex; flex-direction: column; gap: 12px; align-items: flex-start; }
.foot-brand__cn { font-size: 22px; font-weight: 900; letter-spacing: .08em; }
.foot-brand__sub {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--gold);
}
.foot-brand__note { font-size: 14px; line-height: 1.75; color: var(--mist); max-width: 30ch; }

.foot-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--paper);
}
.foot-col__title::before {
  content: "";
  width: 16px; height: 1px;
  background: var(--gold);
  flex: 0 0 auto;
}
.foot-col__list { display: flex; flex-direction: column; gap: 2px; }
.foot-link {
  display: inline-block;
  padding: 6px 0;
  font-size: 14.5px;
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}
.foot-link:hover { color: var(--cyan); border-bottom-color: rgba(34, 224, 214, .5); }
.foot-link--inline { padding: 0; border-bottom: 1px solid var(--line); }

.foot-contact { display: flex; flex-direction: column; }
.contact-list { display: flex; flex-direction: column; }
.contact-list__row {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px dashed rgba(30, 53, 80, .9);
}
.contact-list__value { font-size: 14px; color: var(--paper); word-break: break-all; line-height: 1.6; }
.copy-btn {
  padding: 5px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--mist);
  border: 1px solid var(--line);
  transition: color var(--ease), border-color var(--ease);
}
.copy-btn:hover { color: var(--cyan); border-color: var(--cyan); }
.copy-btn.is-done { color: var(--green); border-color: var(--green); }
.foot-contact__hours { margin-top: 14px; font-size: 13px; color: var(--mist); }

.foot-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 18px clamp(18px, 4vw, 56px) 26px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--mist);
}
.foot-base__legal { color: var(--paper); }
.foot-base__links { display: flex; flex-wrap: wrap; gap: 18px; }
.foot-base__links .foot-link { font-family: var(--font-mono); font-size: 11.5px; padding: 0; }

/* 11. 动效与显现 */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 460ms cubic-bezier(.22, .68, .28, 1), transform 460ms cubic-bezier(.22, .68, .28, 1);
}
[data-reveal].is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 1ms !important; animation-duration: 1ms !important; }
  [data-progress] { display: none; }
  [data-reveal] { opacity: 1; transform: none; }
}