/* =====================================================
   乐鱼CN · 全站基础样式 /assets/site.css
   ===================================================== */

/* ---------- 0. 变量 ---------- */
:root {
  --c-primary: #0A1A3F;
  --c-primary-2: #0C1E49;
  --c-accent: #FF6B35;
  --c-accent-2: #FF8147;
  --c-gold: #F7B733;
  --c-dark: #050A18;
  --c-glass: rgba(255,255,255,0.08);
  --c-glass-strong: rgba(255,255,255,0.14);
  --c-text: #E8ECF2;
  --c-muted: #A8B3C4;
  --c-green: #2ECC71;
  --font-display: "Oswald", "Bahnschrift", "DIN Condensed", "Arial Narrow", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "SF Mono", "Cascadia Mono", "Consolas", "Liberation Mono", monospace;
  --container: 1180px;
  --rail-w: 232px;
  --mobile-h: 64px;
  --radius: 12px;
  --shadow-panel: 0 10px 30px rgba(2,6,18,0.32);
}

/* ---------- 1. Reset 与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(165deg, var(--c-primary) 0%, #091a3d 55%, var(--c-dark) 100%);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, p, figure, dl, dd {
  margin: 0;
}

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

a {
  color: var(--c-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

button, input, select, textarea {
  font-family: inherit;
  font-size: 100%;
}

:focus-visible {
  outline: 2px solid var(--c-gold);
  outline-offset: 3px;
}

::selection {
  background: rgba(255,107,53,0.55);
  color: #ffffff;
}

#main-content {
  scroll-margin-top: calc(var(--mobile-h) + 16px);
}

@media (min-width: 1024px) {
  body {
    margin-left: var(--rail-w);
  }
  #main-content {
    scroll-margin-top: 16px;
  }
}

/* ---------- 2. 工具类 ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 500;
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 700;
  background: var(--c-gold);
  color: #0A1A3F;
  border-radius: 5px;
  text-decoration: none;
  transform: translateY(-220%);
  transition: transform 0.22s ease;
}

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

/* ---------- 3. 滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 300;
  pointer-events: none;
}

.scroll-progress-bar {
  display: block;
  height: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--c-accent), var(--c-gold));
  box-shadow: 0 0 12px rgba(255,107,53,0.55);
}

/* ---------- 4. 页头侧轨导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 200;
  width: var(--rail-w);
  background: linear-gradient(180deg, rgba(10,26,63,0.98), rgba(7,16,38,0.96));
  border-right: 1px solid rgba(255,255,255,0.08);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.site-header::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 3px;
  background: repeating-linear-gradient(180deg, rgba(247,183,51,0.28) 0 6px, transparent 6px 14px);
  pointer-events: none;
}

.site-header[data-scrolled] {
  background: rgba(6,14,34,0.95);
  box-shadow: 12px 0 30px rgba(0,0,0,0.16);
}

.header-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 22px 14px 18px;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--c-text);
  border-radius: 8px;
}

.brand:hover {
  color: #ffffff;
}

.brand-text {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.brand-cn {
  color: var(--c-accent);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
}

.brand-mark {
  position: relative;
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  border-radius: 9px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--c-accent) 0%, #ff8b57 46%, rgba(5,10,24,0.9) 46.5%);
  border: 1px solid rgba(255,255,255,0.28);
  box-shadow: 0 4px 12px rgba(255,107,53,0.32), inset 0 0 0 3px rgba(5,10,24,0.5);
}

.brand-mark::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 20px;
  width: 46px;
  height: 4px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--c-gold), #ffd56b);
  transform: rotate(-12deg);
  box-shadow: 0 -8px 0 rgba(247,183,51,0.35), 0 -16px 0 rgba(247,183,51,0.12);
}

/* 移动端导航按钮 */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.04);
  border-radius: 9px;
  cursor: pointer;
  color: var(--c-text);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.nav-toggle:hover {
  border-color: var(--c-accent);
  background: rgba(255,107,53,0.12);
}

.nav-toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-text);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* 导航主体 */
.site-nav {
  display: flex;
  flex-direction: column;
  flex: 1;
  margin-top: 26px;
  gap: 14px;
  min-height: 0;
  overflow-y: auto;
  visibility: visible;
}

.nav-list {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 8px 0 24px;
}

.nav-list::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(255,255,255,0.14) 10%, rgba(255,255,255,0.14) 90%, transparent);
}

.nav-item {
  margin: 0;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 40px;
  padding: 0 12px;
  border-radius: 7px;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--c-muted);
  text-decoration: none;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-link::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 50%;
  width: 8px;
  height: 2px;
  border-radius: 2px;
  background: #2c4780;
  transform: translateY(-50%);
  transition: background 0.2s ease, box-shadow 0.2s ease, width 0.2s ease;
}

.nav-link:hover {
  color: var(--c-text);
  background: rgba(255,255,255,0.045);
}

.nav-link:hover::before {
  background: var(--c-muted);
  width: 11px;
}

.nav-link[aria-current="page"] {
  color: var(--c-accent);
  background: rgba(255,107,53,0.1);
  font-weight: 600;
}

.nav-link[aria-current="page"]::before {
  background: var(--c-accent);
  width: 14px;
  box-shadow: 0 0 10px rgba(255,107,53,0.7);
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: #6a7fa3;
  transition: color 0.2s ease;
}

.nav-link[aria-current="page"] .nav-index {
  color: var(--c-gold);
}

.nav-label {
  display: block;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rail-note {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  align-self: center;
  min-height: 80px;
  max-height: 200px;
  writing-mode: vertical-rl;
  font-size: 10px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: rgba(168,179,196,0.45);
  user-select: none;
}

.nav-meta {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  border: 1px solid rgba(255,255,255,0.09);
  background: rgba(255,255,255,0.035);
  border-radius: 10px;
}

.nav-meta-label {
  color: var(--c-muted);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.nav-meta-value {
  color: var(--c-gold);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* 移动端头部与抽屉 */
@media (max-width: 1023.98px) {
  body {
    margin-left: 0;
  }

  .site-header {
    width: auto;
    right: 0;
    bottom: auto;
    height: var(--mobile-h);
    background: rgba(7,15,36,0.92);
    border-right: 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }

  .site-header::after {
    display: none;
  }

  .site-header[data-scrolled] {
    background: rgba(5,10,24,0.92);
    box-shadow: 0 10px 24px rgba(0,0,0,0.2);
  }

  .header-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 16px;
  }

  .brand-text {
    font-size: 21px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    top: var(--mobile-h);
    left: 0;
    bottom: 0;
    width: 320px;
    max-width: 88vw;
    min-height: 0;
    margin-top: 0;
    padding: 22px 18px 24px;
    background: rgba(5,10,24,0.98);
    border-right: 1px solid rgba(255,255,255,0.1);
    box-shadow: 12px 0 34px rgba(0,0,0,0.28);
    visibility: hidden;
    transform: translateX(-103%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.3s step-end;
  }

  .site-nav[data-open] {
    visibility: visible;
    transform: translateX(0);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), visibility 0s;
  }

  .rail-note {
    display: none;
  }
}

/* ---------- 5. 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #0a1a3f 0%, var(--c-dark) 74%);
  color: var(--c-text);
}

.site-footer::before {
  content: "";
  position: absolute;
  right: -12%;
  top: -30%;
  width: 560px;
  height: 440px;
  background: radial-gradient(closest-side, rgba(255,107,53,0.13), transparent 72%);
  pointer-events: none;
}

.site-footer::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent) 0%, var(--c-gold) 55%, transparent 90%);
  opacity: 0.55;
  pointer-events: none;
}

.footer-inner {
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px clamp(20px, 4vw, 40px) 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.85fr 0.85fr 1.05fr;
  gap: 40px 36px;
}

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

.footer-brand {
  margin-bottom: 14px;
}

.footer-slogan {
  max-width: 30em;
  margin-bottom: 16px;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.8;
}

.footer-trust {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid rgba(46,204,113,0.3);
  background: rgba(46,204,113,0.07);
  color: var(--c-text);
  font-size: 13px;
  border-radius: 999px;
}

.trust-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 10px rgba(46,204,113,0.75);
}

.footer-title {
  margin-bottom: 14px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.footer-links {
  display: grid;
  gap: 8px;
}

.footer-links a {
  display: inline-block;
  color: var(--c-muted);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-links a:hover {
  color: var(--c-accent);
  padding-left: 4px;
}

.footer-contact,
.footer-address,
.footer-service {
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.8;
}

.footer-contact {
  margin-top: 14px;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 20px;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
  color: var(--c-muted);
  font-size: 13px;
}

.footer-icp {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-muted);
}

@media (max-width: 1023.98px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    justify-content: center;
    text-align: center;
  }
}

/* ---------- 6. 通用排版与容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 40px);
}

.section {
  padding: 64px 0;
}

@media (max-width: 640px) {
  .section {
    padding: 44px 0;
  }
}

.section-kicker {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.section-title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.12;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  color: var(--c-text);
}

/* ---------- 7. Bento 网格 ---------- */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 16px;
}

.bento-item {
  grid-column: span 6;
}

.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-6 { grid-column: span 6; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

@media (max-width: 1023.98px) {
  .span-3,
  .span-4,
  .span-6,
  .span-8,
  .bento-item {
    grid-column: span 6;
  }
}

@media (max-width: 640px) {
  .span-3,
  .span-4,
  .span-6,
  .span-8,
  .span-12,
  .bento-item {
    grid-column: 1 / -1;
  }
}

/* ---------- 8. 通用组件 ---------- */
.panel {
  padding: 22px;
  background: var(--c-glass);
  border: 1px solid rgba(255,255,255,0.09);
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.panel:hover {
  transform: translateY(-3px);
  border-color: rgba(255,107,53,0.35);
  box-shadow: 0 16px 40px rgba(3,8,24,0.45);
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 22px;
  border: 1px solid transparent;
  border-radius: 5px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
  color: var(--c-text);
  background: transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn::after {
  content: "";
  width: 16px;
  height: 2px;
  margin-left: 2px;
  background: currentColor;
  clip-path: polygon(0 0, calc(100% - 5px) 0, 100% 50%, calc(100% - 5px) 100%, 0 100%, 5px 50%);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--c-accent);
  color: #ffffff;
  box-shadow: 0 6px 18px rgba(255,107,53,0.32);
}

.btn-primary:hover {
  background: var(--c-accent-2);
  box-shadow: 0 10px 26px rgba(255,107,53,0.42);
}

.btn-ghost {
  border-color: rgba(255,255,255,0.28);
  color: var(--c-text);
  background: rgba(255,255,255,0.02);
}

.btn-ghost:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
  background: rgba(255,107,53,0.06);
}

.stat-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 20px;
  background: rgba(255,255,255,0.045);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 10px;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 600;
  line-height: 1.15;
  color: var(--c-text);
  letter-spacing: 0.02em;
}

.stat-value em {
  font-style: normal;
  color: var(--c-gold);
}

.stat-label {
  color: var(--c-muted);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.14);
  background: rgba(255,255,255,0.05);
  color: var(--c-text);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.tag-gold {
  border-color: rgba(247,183,51,0.42);
  background: rgba(247,183,51,0.08);
  color: var(--c-gold);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 20px;
  font-size: 13px;
  color: var(--c-muted);
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin: 0 8px;
  color: var(--c-muted);
  opacity: 0.5;
}

.breadcrumb-link {
  color: var(--c-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.breadcrumb-link:hover {
  color: var(--c-accent);
}

.trust-line {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--c-muted);
}

.trust-line::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--c-green);
  box-shadow: 0 0 10px rgba(46,204,113,0.6);
}

/* ---------- 9. 图片占位容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(255,255,255,0.07), rgba(5,10,24,0.45));
  border: 1px solid rgba(255,255,255,0.1);
}

.media-frame::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.media-frame-tall::before {
  padding-top: 125%;
}

.media-frame img,
.media-frame video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 10. 装饰层 ---------- */
.deco-speedlines {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.deco-speedlines::before {
  content: "";
  position: absolute;
  inset: -20%;
  background-image: repeating-linear-gradient(-45deg, rgba(255,255,255,0.06) 0 1px, transparent 1px 22px);
}

.deco-glow {
  position: absolute;
  width: 36vw;
  height: 36vw;
  min-width: 260px;
  min-height: 260px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(255,107,53,0.16), transparent 72%);
  pointer-events: none;
}

.vertical-note {
  display: inline-block;
  writing-mode: vertical-rl;
  letter-spacing: 0.22em;
  font-size: 12px;
  color: var(--c-muted);
  text-transform: uppercase;
  line-height: 2;
}

/* ---------- 11. 滚动显现 ---------- */
html.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

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

html.has-js [data-reveal-delay="1"] { transition-delay: 0.08s; }
html.has-js [data-reveal-delay="2"] { transition-delay: 0.16s; }
html.has-js [data-reveal-delay="3"] { transition-delay: 0.24s; }
html.has-js [data-reveal-delay="4"] { transition-delay: 0.32s; }

/* ---------- 12. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

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

  .site-nav {
    transition: none;
  }
}