/* ==========================================================================
   365国际速发 · 共享站点样式 /assets/site.css
   设计逻辑：夜间控制台 · 框景窗口 · 切角描边 · 展览画册式留白
   ========================================================================== */

:root {
  /* 色板 */
  --void: #070B14;
  --graphite: #0E1626;
  --graphite-lift: #101B2D;
  --cool: #8B98AA;
  --mist: #E8EEF5;
  --cyan: #2DE2E6;
  --orange: #FF8A3D;
  --cyan-deep: #1A6E75;
  --orange-deep: #B85B22;
  --line: #223044;
  --green: #4ADE80;

  --glass: rgba(232, 238, 245, 0.04);
  --glass-strong: rgba(232, 238, 245, 0.075);
  --cyan-soft: rgba(45, 226, 230, 0.12);

  /* 尺度 */
  --wrap: 1240px;
  --gutter: clamp(18px, 4vw, 56px);
  --header-h: 92px;
  --cut: 14px;
  --cut-sm: 8px;
  --cut-shape: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
  --cut-shape-sm: polygon(0 0, calc(100% - var(--cut-sm)) 0, 100% var(--cut-sm), 100% 100%, var(--cut-sm) 100%, 0 calc(100% - var(--cut-sm)));

  /* 字体 */
  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

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

body,
h1, h2, h3, h4, p, figure, blockquote, ul, ol, dl, dd {
  margin: 0;
}

ul, ol { padding-left: 0; list-style: none; }

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

button, input, textarea, select { font: inherit; color: inherit; }

a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--mist); }

::selection { background: rgba(45, 226, 230, 0.28); color: var(--mist); }

/* ---------- 页面基底 ---------- */
body {
  min-height: 100vh;
  background-color: var(--void);
  background-image:
    radial-gradient(circle at 10% -8%, rgba(45, 226, 230, 0.10), transparent 46%),
    radial-gradient(circle at 92% 0%, rgba(255, 138, 61, 0.075), transparent 42%),
    repeating-linear-gradient(0deg, rgba(139, 152, 170, 0.045) 0 1px, transparent 1px 64px);
  background-attachment: fixed;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main { display: block; }

#main-content { scroll-margin-top: calc(var(--header-h) + 20px); }

[id] { scroll-margin-top: calc(var(--header-h) + 20px); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 1px;
}

/* ---------- 布局容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.band { padding-block: clamp(44px, 7vw, 96px); }

.band--graphite {
  background: linear-gradient(180deg, rgba(14, 22, 38, 0.88), rgba(7, 11, 20, 0) 88%);
  border-block: 1px solid rgba(34, 48, 68, 0.7);
}

.band--rule { border-top: 1px solid var(--line); }

.stack > * + * { margin-top: clamp(14px, 2vw, 22px); }

/* ---------- 排版 ---------- */
.display-1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 5.4vw, 68px);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.display-2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 3vw, 36px);
  line-height: 1.22;
  letter-spacing: -0.01em;
}

.lede {
  max-width: 58ch;
  font-size: clamp(15.5px, 1.4vw, 18px);
  line-height: 1.85;
  color: var(--cool);
}

.mono {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--cool);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 9px;
  border: 1px solid rgba(45, 226, 230, 0.34);
  background: rgba(45, 226, 230, 0.08);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  line-height: 1.6;
  clip-path: var(--cut-shape-sm);
}

.prose { max-width: 66ch; }
.prose > * + * { margin-top: 1.1em; }
.prose h2 {
  font-family: var(--font-display);
  font-size: clamp(21px, 2.2vw, 27px);
  font-weight: 700;
  line-height: 1.3;
  margin-top: 2em;
}
.prose h3 {
  font-size: clamp(17px, 1.6vw, 20px);
  font-weight: 700;
  margin-top: 1.8em;
}
.prose p { color: #C9D4E2; line-height: 1.85; }
.prose ul, .prose ol { list-style: disc; padding-left: 1.35em; color: #C9D4E2; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.45em; }
.prose strong { color: var(--mist); }
.prose a { border-bottom: 1px solid rgba(45, 226, 230, 0.4); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid var(--line);
  background: var(--glass);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  line-height: 1.4;
  text-decoration: none;
  clip-path: var(--cut-shape-sm);
  cursor: pointer;
  transition: background 0.24s var(--ease), border-color 0.24s var(--ease),
    color 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.btn:hover {
  border-color: rgba(139, 152, 170, 0.7);
  background: var(--glass-strong);
  color: var(--mist);
}

.btn--primary {
  border-color: rgba(45, 226, 230, 0.45);
  background: linear-gradient(120deg, rgba(45, 226, 230, 0.18), rgba(45, 226, 230, 0.05));
  color: var(--cyan);
}

.btn--primary:hover {
  border-color: rgba(45, 226, 230, 0.8);
  background: rgba(45, 226, 230, 0.22);
  color: #C9FEFF;
  box-shadow: 0 10px 26px -14px rgba(45, 226, 230, 0.8);
}

.btn--ghost { background: transparent; color: var(--cool); }
.btn--ghost:hover { color: var(--mist); }

.btn--accent {
  border-color: rgba(255, 138, 61, 0.45);
  background: rgba(255, 138, 61, 0.1);
  color: var(--orange);
}

.btn--accent:hover {
  border-color: rgba(255, 138, 61, 0.8);
  background: rgba(255, 138, 61, 0.18);
  color: #FFC39A;
}

/* ---------- 头部 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--cyan);
  color: #04140F;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 0.22s var(--ease);
}

.skip-link:focus { transform: translateY(0); color: #04140F; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(7, 11, 20, 0.97), rgba(7, 11, 20, 0.84));
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}

.site-header[data-scrolled] {
  background: rgba(6, 10, 18, 0.96);
  border-bottom-color: rgba(45, 226, 230, 0.24);
}

.scroll-meter {
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: rgba(34, 48, 68, 0.85);
  overflow: hidden;
}

.scroll-meter__fill {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.12s linear;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(12px, 3vw, 32px);
  min-height: var(--header-h);
  padding-block: 12px;
  transition: min-height 0.3s var(--ease);
}

.site-header[data-scrolled] .site-header__inner { min-height: 68px; }

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  color: var(--mist);
  text-decoration: none;
  flex: 0 1 auto;
  min-width: 0;
}

.site-header__brand:hover { color: var(--mist); }

.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  background: var(--graphite);
  border: 1px solid var(--line);
  clip-path: var(--cut-shape-sm);
  transition: border-color 0.25s var(--ease);
}

.site-header__brand:hover .brand-mark { border-color: rgba(45, 226, 230, 0.6); }

.brand-mark__dot {
  width: 8px;
  height: 8px;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(45, 226, 230, 0.14);
  animation: brandPulse 3.8s ease-in-out infinite;
}

.brand-mark__bar {
  position: absolute;
  left: 6px;
  right: 6px;
  bottom: 6px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), rgba(45, 226, 230, 0));
}

@keyframes brandPulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 3px rgba(45, 226, 230, 0.14); }
  50% { opacity: 0.62; box-shadow: 0 0 0 5px rgba(45, 226, 230, 0.06); }
}

.brand-text { display: grid; gap: 1px; min-width: 0; }

.brand-text__name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.35;
  white-space: nowrap;
}

.brand-text__sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.13em;
  color: var(--cool);
  line-height: 1.5;
  white-space: nowrap;
}

.site-header__aside {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 20px);
  min-width: 0;
}

.header-chip {
  padding: 5px 9px;
  border: 1px solid var(--line);
  background: var(--glass);
  color: var(--cool);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  white-space: nowrap;
  clip-path: var(--cut-shape-sm);
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 11px;
  color: var(--cool);
  font-size: 14px;
  letter-spacing: 0.05em;
  line-height: 1.5;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 3px;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.26s var(--ease);
}

.nav-link:hover {
  color: var(--mist);
  background: var(--glass);
}

.nav-link:hover::after { transform: scaleX(1); }

.nav-link[aria-current="page"] {
  color: var(--cyan);
  background: rgba(45, 226, 230, 0.08);
}

.nav-link[aria-current="page"]::after { transform: scaleX(1); }

.nav-cta { margin-left: 8px; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  background: var(--graphite);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  clip-path: var(--cut-shape-sm);
  cursor: pointer;
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.nav-toggle:hover { border-color: rgba(45, 226, 230, 0.5); background: var(--graphite-lift); }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 1px;
  background: var(--cyan);
  transition: transform 0.26s var(--ease), opacity 0.2s var(--ease);
}

.site-header[data-open] .nav-toggle__bars span:first-child { transform: translateY(2.5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars span:last-child { transform: translateY(-2.5px) rotate(-45deg); }
.site-header[data-open] .nav-toggle { border-color: rgba(45, 226, 230, 0.6); }

/* ---------- 框景 / 网格 / 卡片 ---------- */
.frame {
  position: relative;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(14, 22, 38, 0.55), rgba(7, 11, 20, 0.2));
  padding: clamp(20px, 3.4vw, 52px);
}

.frame::before,
.frame::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid rgba(45, 226, 230, 0.65);
  pointer-events: none;
}

.frame::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.frame::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 28px);
}

.grid-12 > * { grid-column: span 12; min-width: 0; }
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-9 { grid-column: span 9; }

.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--line);
  background: var(--graphite);
  clip-path: var(--cut-shape);
  transition: border-color 0.26s var(--ease), background 0.26s var(--ease),
    transform 0.26s var(--ease);
}

.card:hover {
  border-color: rgba(45, 226, 230, 0.42);
  background: var(--graphite-lift);
  transform: translateY(-2px);
}

.card--glass {
  background: var(--glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-color: rgba(139, 152, 170, 0.28);
}

.card__index {
  display: block;
  margin-bottom: 10px;
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--cool);
}

.breadcrumb a { color: var(--cool); text-decoration: none; transition: color 0.2s var(--ease); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb__sep { color: var(--line); }
.breadcrumb [aria-current="page"] { color: var(--mist); }

/* ---------- 图片容器（供页面阶段填充） ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 30% 20%, rgba(45, 226, 230, 0.14), transparent 60%),
    var(--graphite);
  clip-path: var(--cut-shape);
}

.media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.86) contrast(1.06);
}

.media__caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 12px 16px;
  background: linear-gradient(0deg, rgba(7, 11, 20, 0.94), transparent);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--3x4 { aspect-ratio: 3 / 4; }

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(40px, 6vw, 80px);
  background: linear-gradient(180deg, rgba(14, 22, 38, 0.72), #060910 72%);
  border-top: 1px solid var(--line);
  overflow: hidden;
}

.footer-scan {
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan) 30%, var(--orange) 70%, transparent);
  opacity: 0.7;
}

.footer-inner { padding-block: clamp(38px, 5.6vw, 72px) 0; }

.footer-grid {
  display: grid;
  grid-template-columns: 1.7fr 1fr 1fr 1.4fr;
  gap: clamp(20px, 3vw, 44px);
  padding-bottom: clamp(28px, 4vw, 48px);
}

.footer-brand { min-width: 0; }

.footer-brand__name {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.3;
  color: var(--mist);
}

.footer-brand__note {
  margin-top: 8px;
  max-width: 34ch;
  color: var(--cool);
  font-size: 13.5px;
  line-height: 1.75;
}

.footer-brand__tag {
  display: inline-block;
  margin-top: 16px;
  padding: 4px 9px;
  border: 1px solid rgba(45, 226, 230, 0.3);
  background: rgba(45, 226, 230, 0.06);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  clip-path: var(--cut-shape-sm);
}

.footer-col { min-width: 0; }

.footer-col__title {
  margin-bottom: 14px;
  color: var(--cool);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.footer-list { display: grid; gap: 9px; }

.footer-link {
  display: inline-block;
  color: #C9D4E2;
  font-size: 14px;
  line-height: 1.6;
  text-decoration: none;
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}

.footer-link:hover { color: var(--cyan); transform: translateX(2px); }

.footer-col--contact .footer-list { gap: 12px; }

.footer-contact {
  display: grid;
  gap: 2px;
  color: var(--cool);
  font-size: 12.5px;
  line-height: 1.6;
}

.footer-contact__value {
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  word-break: break-word;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 16px 22px;
  border-top: 1px solid rgba(34, 48, 68, 0.85);
  color: var(--cool);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.09em;
}

.footer-legal__line { margin: 0; }
.footer-legal__dot { color: var(--cyan); }

/* ---------- 滚动显现 ---------- */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}

.has-js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 平板 ---------- */
@media (max-width: 1180px) {
  .header-chip { display: none; }
}

@media (max-width: 1024px) {
  .span-3, .span-4, .span-5, .span-6, .span-7, .span-8, .span-9 { grid-column: span 12; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
}

/* ---------- 移动导航 ---------- */
@media (max-width: 940px) {
  .nav-toggle { display: inline-flex; }

  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: block;
    padding: 10px var(--gutter) 26px;
    border-bottom: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(14, 22, 38, 0.99), rgba(6, 10, 18, 0.99));
    box-shadow: 0 24px 40px -30px rgba(0, 0, 0, 0.9);
    max-height: calc(100vh - 70px);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.26s var(--ease), transform 0.26s var(--ease),
      visibility 0.26s var(--ease);
  }

  .site-header[data-open] .primary-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-link {
    display: block;
    padding: 14px 4px;
    font-size: 16px;
    border-bottom: 1px solid rgba(34, 48, 68, 0.7);
  }

  .nav-link::after { display: none; }

  .nav-link:hover { background: transparent; }

  .nav-link[aria-current="page"] {
    background: transparent;
    padding-left: 12px;
    box-shadow: inset 2px 0 0 var(--cyan);
  }

  .nav-cta {
    width: 100%;
    margin: 18px 0 0;
    justify-content: center;
  }
}

/* ---------- 手机 ---------- */
@media (max-width: 600px) {
  :root { --header-h: 74px; --cut: 10px; }

  .brand-mark { width: 32px; height: 32px; }
  .brand-text__name { font-size: 15.5px; }
  .brand-text__sub { font-size: 9.5px; letter-spacing: 0.1em; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: span 1; }
  .footer-legal { flex-direction: column; align-items: flex-start; }

  .media--16x9 { aspect-ratio: 4 / 3; }
}

@media (max-width: 400px) {
  .brand-text__sub { display: none; }
  .btn { padding: 10px 14px; font-size: 12px; }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .has-js [data-reveal] { opacity: 1; transform: none; }
  .card:hover, .footer-link:hover { transform: none; }
}