/* ============================================================
   速博网 · /assets/site.css
   共享外壳：reset / tokens / 中文排版 / 页头 / 页脚 / 基础组件
   ============================================================ */

/* ---------- 1. reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, blockquote,
dl, dd, fieldset {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }

img, svg, picture, video {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

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

table { border-collapse: collapse; width: 100%; }

/* ---------- 2. tokens ---------- */
:root {
  --navy: #0B2545;
  --navy-2: #13315C;
  --cyan: #17E9D1;
  --cyan-deep: #0A8F86;
  --coral: #FF6B4A;
  --paper: #F5F1EA;
  --paper-white: #FFFDF8;
  --ink: #111820;
  --grey: #5E6B78;
  --mint: #D9FFF9;
  --violet: #6C5CE7;
  --line: #D8D2C6;

  --rail: 112px;
  --gutter: clamp(18px, 4vw, 48px);
  --max: 1200px;

  --f-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --f-mono: "JetBrains Mono", "Noto Sans Mono", SFMono-Regular, Consolas, "Liberation Mono", monospace;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --shadow-paper: 0 1px 0 rgba(11, 37, 69, .05), 0 14px 30px -24px rgba(11, 37, 69, .5);
}

/* ---------- 3. 中文排版基线 ---------- */
body {
  font-family: var(--f-sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.8;
  color: var(--ink);
  background-color: var(--paper);
  background-image: repeating-linear-gradient(
    0deg,
    rgba(11, 37, 69, .018) 0 1px,
    transparent 1px 7px
  );
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -.015em;
  color: var(--ink);
}

h1 { font-weight: 900; letter-spacing: -.035em; }

p { max-width: 68ch; }

strong, b { font-weight: 700; }

:focus-visible {
  outline: 2px solid var(--cyan-deep);
  outline-offset: 3px;
  border-radius: 2px;
}

.site-header :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--cyan);
}

/* ---------- 4. 滚动进度线（由 JS 注入） ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
  z-index: 120;
}

/* ---------- 5. 页头 · 移动优先 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 400;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--navy);
  background: var(--cyan);
  border: 1px solid var(--navy);
  border-radius: 2px;
  transform: translateY(-180%);
  transition: transform .2s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  background-color: var(--navy);
  background-image: repeating-linear-gradient(
    90deg,
    rgba(23, 233, 209, .05) 0 1px,
    transparent 1px 6px
  );
  color: var(--paper);
  border-bottom: 1px solid rgba(23, 233, 209, .22);
}

.site-header__top {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px clamp(14px, 4vw, 24px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1 1 auto;
  min-width: 0;
}

.brand__mark {
  position: relative;
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  border: 1.5px solid var(--cyan);
  border-radius: 2px;
  background:
    linear-gradient(var(--cyan), var(--cyan)) center / 10px 1.5px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) center / 1.5px 10px no-repeat;
}

.brand__mark::after {
  content: "";
  position: absolute;
  right: -4px;
  bottom: -4px;
  width: 10px;
  height: 10px;
  background: var(--coral);
  border: 1.5px solid var(--navy);
  border-radius: 1px;
}

.brand__text { display: flex; flex-direction: column; min-width: 0; }

.brand__name {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .04em;
  line-height: 1.2;
  color: var(--paper-white);
}

.brand__sub {
  display: none;
  font-family: var(--f-mono);
  font-size: 9.5px;
  letter-spacing: .16em;
  line-height: 1.4;
  color: rgba(245, 241, 234, .5);
}

.rail-tagline {
  flex: 0 1 auto;
  max-width: 6.5em;
  font-size: 10px;
  line-height: 1.35;
  letter-spacing: .04em;
  text-align: right;
  color: rgba(245, 241, 234, .5);
  max-width: none;
}

.rail-path { display: none; }

.rail-path__k {
  display: block;
  font-family: var(--f-mono);
  font-size: 9px;
  letter-spacing: .18em;
  color: rgba(23, 233, 209, .65);
}

.rail-path__v {
  display: block;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: .03em;
  color: var(--cyan);
  word-break: break-all;
}

.nav-toggle {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 11px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--paper-white);
  border: 1px solid rgba(23, 233, 209, .42);
  border-radius: 2px;
  transition: background .18s var(--ease), border-color .18s var(--ease);
}

.nav-toggle:hover { background: rgba(23, 233, 209, .12); }

.nav-toggle__box {
  display: grid;
  gap: 3px;
  width: 16px;
}

.nav-toggle__box span {
  display: block;
  height: 1.5px;
  background: var(--cyan);
  border-radius: 1px;
  transition: transform .22s var(--ease), opacity .18s var(--ease);
}

.site-header[data-open] .nav-toggle__box span:nth-child(1) {
  transform: translateY(4.5px) rotate(45deg);
}

.site-header[data-open] .nav-toggle__box span:nth-child(2) {
  opacity: 0;
}

.site-header[data-open] .nav-toggle__box span:nth-child(3) {
  transform: translateY(-4.5px) rotate(-45deg);
}

.site-nav {
  display: none;
  background: var(--navy-2);
  border-top: 1px solid rgba(245, 241, 234, .12);
}

.site-header[data-open] .site-nav { display: block; }

.nav-list {
  display: flex;
  align-items: stretch;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  padding: 0 clamp(10px, 3vw, 18px);
}

.nav-list::-webkit-scrollbar { display: none; }

.nav-item { flex: 0 0 auto; }

.nav-link {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 13px 13px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .02em;
  white-space: nowrap;
  color: rgba(245, 241, 234, .7);
  border-bottom: 2px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.nav-link:hover { color: var(--paper-white); }

.nav-link__idx {
  font-family: var(--f-mono);
  font-size: 9.5px;
  letter-spacing: .06em;
  color: var(--cyan);
  opacity: .55;
  transition: color .18s var(--ease), opacity .18s var(--ease);
}

.nav-link[aria-current="page"] {
  color: var(--paper-white);
  border-bottom-color: var(--cyan);
}

.nav-link[aria-current="page"] .nav-link__idx {
  color: var(--coral);
  opacity: 1;
}

.site-header__foot { display: none; }

.rail-cta {
  display: block;
  width: 100%;
  padding: 8px 4px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .04em;
  text-align: center;
  color: var(--navy);
  background: var(--coral);
  border-radius: 2px;
  transition: background .18s var(--ease), transform .18s var(--ease);
}

.rail-cta:hover { background: #ff8266; }

.util-list {
  display: grid;
  gap: 3px;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(245, 241, 234, .14);
}

.util-link {
  display: inline-block;
  padding: 2px 0;
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: .03em;
  color: rgba(245, 241, 234, .58);
  transition: color .18s var(--ease);
}

.util-link:hover { color: var(--cyan); }

/* ---------- 6. 页头 · 桌面侧边轨道 ---------- */
@media (min-width: 900px) {

  body { padding-left: var(--rail); }

  html { scroll-padding-top: 24px; }

  .scroll-progress {
    left: var(--rail);
    width: calc(100% - var(--rail));
  }

  .site-header {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--rail);
    height: 100vh;
    height: 100dvh;
    padding: 22px 9px 20px;
    justify-content: flex-start;
    border-bottom: 0;
    border-right: 1px solid rgba(23, 233, 209, .22);
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .site-header__top {
    flex-direction: column;
    align-items: flex-start;
    gap: 15px;
    padding: 0;
    width: 100%;
  }

  .brand {
    flex: 0 0 auto;
    flex-direction: column;
    align-items: flex-start;
    gap: 9px;
    width: 100%;
  }

  .brand__name { font-size: 15px; letter-spacing: .06em; }

  .brand__sub { display: block; }

  .rail-tagline {
    max-width: none;
    text-align: left;
    font-size: 10px;
    line-height: 1.5;
    letter-spacing: .05em;
  }

  .rail-path {
    display: block;
    width: 100%;
    padding-top: 10px;
    border-top: 1px solid rgba(245, 241, 234, .16);
  }

  .nav-toggle { display: none; }

  .site-nav {
    display: block;
    margin-top: 18px;
    width: 100%;
    background: transparent;
    border-top: 0;
  }

  .nav-list {
    flex-direction: column;
    gap: 2px;
    padding: 0;
    overflow: visible;
  }

  .nav-item { width: 100%; }

  .nav-link {
    padding: 8px 7px;
    font-size: 12.5px;
    letter-spacing: .01em;
    border-bottom: 0;
    border-left: 2px solid transparent;
    border-radius: 0 2px 2px 0;
  }

  .nav-link__label { white-space: nowrap; }

  .nav-link[aria-current="page"] {
    border-bottom-color: transparent;
    border-left-color: var(--cyan);
    background: rgba(23, 233, 209, .09);
  }

  .site-header__foot {
    display: block;
    margin-top: auto;
    padding-top: 24px;
    width: 100%;
  }
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 96px);
  background-color: var(--navy);
  background-image:
    linear-gradient(180deg, rgba(23, 233, 209, .07), transparent 240px),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, .022) 0 1px, transparent 1px 6px);
  color: rgba(245, 241, 234, .78);
  border-top: 1px solid rgba(23, 233, 209, .25);
}

.site-footer__main {
  max-width: var(--max);
  margin-inline: auto;
  padding: clamp(38px, 6vw, 72px) var(--gutter) clamp(28px, 4vw, 46px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 52px);
}

.footer-brand__name {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--paper-white);
}

.footer-brand__tagline {
  margin-top: 12px;
  font-size: 14px;
  font-weight: 300;
  letter-spacing: .1em;
  color: rgba(23, 233, 209, .88);
  max-width: none;
}

.footer-brand__icp {
  margin-top: 18px;
  display: inline-block;
  padding: 4px 10px;
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: .06em;
  color: rgba(245, 241, 234, .6);
  border: 1px solid rgba(245, 241, 234, .2);
  border-radius: 2px;
  max-width: none;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: clamp(18px, 3vw, 30px);
  align-content: start;
}

.footer-col__title {
  margin-bottom: 12px;
  padding-bottom: 9px;
  font-family: var(--f-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--cyan);
  border-bottom: 1px solid rgba(23, 233, 209, .28);
}

.footer-list {
  display: grid;
  gap: 1px;
}

.footer-link {
  display: inline-block;
  padding: 5px 0;
  font-size: 14px;
  color: rgba(245, 241, 234, .72);
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.footer-link:hover {
  color: var(--paper-white);
  border-bottom-color: var(--cyan);
}

.footer-meta {
  display: grid;
  gap: 12px;
  align-content: start;
}

.footer-meta__row {
  display: grid;
  gap: 1px;
  max-width: none;
}

.footer-meta__k {
  font-family: var(--f-mono);
  font-size: 9.5px;
  letter-spacing: .18em;
  color: rgba(23, 233, 209, .7);
}

.footer-meta__v {
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(245, 241, 234, .84);
  word-break: break-word;
}

.site-footer__base {
  border-top: 1px solid rgba(245, 241, 234, .15);
  background: rgba(0, 0, 0, .18);
}

.site-footer__base-inner {
  max-width: var(--max);
  margin-inline: auto;
  padding: 16px var(--gutter) 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: baseline;
  justify-content: space-between;
}

.footer-fine {
  flex: 1 1 320px;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(245, 241, 234, .53);
  max-width: 62ch;
}

.footer-copy {
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: rgba(245, 241, 234, .5);
  max-width: none;
}

.footer-copy .footer-link {
  padding: 0;
  font-family: var(--f-mono);
  font-size: 11.5px;
  color: rgba(23, 233, 209, .85);
}

@media (min-width: 860px) {
  .site-footer__main {
    grid-template-columns: 1.15fr 2.1fr 1.2fr;
    align-items: start;
  }
}

/* ---------- 8. 通用内容组件 ---------- */
.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(44px, 7vw, 92px);
}

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  margin-bottom: clamp(20px, 3vw, 34px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan-deep);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--grey);
}

.breadcrumbs a {
  color: var(--cyan-deep);
  border-bottom: 1px solid rgba(10, 143, 134, .35);
  padding-bottom: 1px;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.breadcrumbs a:hover {
  color: var(--navy);
  border-bottom-color: var(--navy);
}

.breadcrumbs__sep { color: var(--line); }

.breadcrumbs [aria-current="page"] { color: var(--ink); }

.label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--grey);
  background: var(--paper-white);
}

.label--mint {
  background: var(--mint);
  border-color: rgba(10, 143, 134, .32);
  color: var(--cyan-deep);
}

.label--violet {
  background: rgba(108, 92, 231, .1);
  border-color: rgba(108, 92, 231, .38);
  color: var(--violet);
}

.label--coral {
  background: rgba(255, 107, 74, .13);
  border-color: rgba(255, 107, 74, .42);
  color: #b8391a;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  font-family: var(--f-sans);
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1.3;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: background .18s var(--ease), color .18s var(--ease),
              border-color .18s var(--ease), transform .18s var(--ease);
}

.btn--primary {
  background: var(--coral);
  color: var(--navy);
  border-color: var(--coral);
}

.btn--primary:hover {
  background: #ff8266;
  border-color: #ff8266;
  transform: translateY(-1px);
}

.btn--path {
  background: var(--navy);
  color: var(--paper-white);
  border-color: var(--navy);
}

.btn--path:hover {
  background: var(--navy-2);
  border-color: var(--navy-2);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.btn--ghost:hover {
  color: var(--cyan-deep);
  border-color: var(--cyan-deep);
}

.btn__arrow {
  display: inline-block;
  transition: transform .2s var(--ease);
}

.btn:hover .btn__arrow { transform: translateX(4px); }

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(18px, 3vw, 26px);
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: 3px;
  box-shadow: var(--shadow-paper);
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}

.card:hover,
.card:focus-within {
  border-color: var(--cyan-deep);
  transform: translateY(-2px);
}

/* 图片容器基础（页面阶段放 <img> 占位） */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 16 / 10;
  background: var(--paper-white);
  border: 1px solid var(--line);
  border-radius: 3px;
}

.media > img,
.media > picture,
.media > picture > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--phone { aspect-ratio: 9 / 18; }
.media--square { aspect-ratio: 1 / 1; }
.media--wide { aspect-ratio: 21 / 9; }

.media__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 5px 10px;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: .12em;
  background: var(--navy);
  color: var(--cyan);
}

.media__idx {
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 2px 8px;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--navy);
  background: var(--cyan);
  border-radius: 2px;
}

/* ---------- 9. 无障碍与动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  .card:hover,
  .card:focus-within,
  .btn:hover,
  .rail-cta:hover {
    transform: none;
  }

  .btn:hover .btn__arrow { transform: none; }
}

/* ---------- 10. 打印 ---------- */
@media print {
  .site-header,
  .site-footer__base,
  .scroll-progress,
  .skip-link { display: none !important; }

  body {
    padding-left: 0;
    background: #fff;
    color: #000;
    font-size: 12pt;
  }

  .site-footer {
    background: #fff;
    color: #000;
    border-top: 1px solid #999;
  }
}