:root {
  --text: #1e293b;
  --muted: #64748b;
  --blue: #2563eb;
  --line: #e2e8f0;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; zoom: 0.75; }
body {
  margin: 0;
  background: linear-gradient(180deg, #eaf6fb 0%, #dcf0f8 45%, #cfe8f3 100%) fixed;
  color: var(--text);
  font-family: Inter, "Segoe UI", sans-serif;
  font-size: 19px;
  font-weight: 400;
  line-height: 1.65;
}
img, video { max-width: 100%; display: block; }
a { color: var(--blue); }
main { position: relative; z-index: 1; }

/* 背景层：小丑鱼和气泡，只在内容后面游动 */
.ocean { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.fish {
  position: absolute;
  left: 0;
  width: var(--w, 64px);
  opacity: var(--o, 0.92);
  animation: swim var(--t, 38s) linear infinite;
  animation-delay: var(--d, 0s);
}
.fish.back { animation-name: swim-back; }
.fish-inner { transition: transform 1.3s cubic-bezier(0.2, 0.7, 0.3, 1), opacity 1.3s ease-out; }
.fish.flee .fish-inner { opacity: 0; }
.fish svg { width: 100%; height: auto; display: block; animation: bob 2.4s ease-in-out infinite; }
.fish .tail { transform-origin: 18px 30px; animation: wag 0.5s ease-in-out infinite alternate; }
@keyframes swim {
  from { transform: translateX(-12vw); }
  to { transform: translateX(112vw); }
}
@keyframes swim-back {
  from { transform: translateX(112vw) scaleX(-1); }
  to { transform: translateX(-12vw) scaleX(-1); }
}
@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
@keyframes wag {
  from { transform: rotate(-12deg); }
  to { transform: rotate(12deg); }
}
.bubble {
  position: absolute;
  bottom: -30px;
  width: var(--s, 10px);
  height: var(--s, 10px);
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.9);
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.15) 60%);
  animation: rise var(--t, 14s) linear infinite;
  animation-delay: var(--d, 0s);
}
@keyframes rise {
  0% { transform: translate(0, 0); opacity: 0; }
  10% { opacity: 0.8; }
  50% { transform: translate(14px, -55vh); }
  100% { transform: translate(-8px, -115vh); opacity: 0; }
}

/* 左侧航行器：随滚动上下移动并俯仰 */
.rov {
  position: fixed;
  left: max(12px, calc((100vw - 980px) / 2 - 190px));
  top: 0;
  z-index: 15;
  width: 160px;
  pointer-events: none;
  will-change: transform;
}
.rov img { width: 100%; height: auto; filter: drop-shadow(0 10px 14px rgba(8, 47, 73, 0.35)); }
.trail {
  position: fixed;
  z-index: 14;
  width: var(--s, 8px);
  height: var(--s, 8px);
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.95);
  background: radial-gradient(circle at 30% 30%, #fff, rgba(186, 230, 253, 0.35) 65%);
  pointer-events: none;
  animation: trail 1.6s ease-out forwards;
}
@keyframes trail {
  0% { transform: translate(0, 0) scale(0.6); opacity: 0.95; }
  100% { transform: translate(var(--dx, 0px), -140px) scale(1.2); opacity: 0; }
}

.more { position: fixed; top: 20px; right: 20px; z-index: 30; }
.more-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.96);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 22px;
  font: inherit;
  font-weight: 700;
  font-size: 18px;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.16);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.more-btn:hover { transform: translateY(-2px); border-color: var(--blue); box-shadow: 0 12px 26px rgba(15, 23, 42, 0.2); }
.more-btn svg { width: 20px; height: 20px; }
.more-btn svg path { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linejoin: round; }
.more-btn .caret { transition: transform 0.2s; }
.more-btn[aria-expanded="true"] .caret { transform: rotate(180deg); }
.more-menu {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: min(460px, calc(100vw - 40px));
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 20px 44px rgba(15, 23, 42, 0.2);
  padding: 10px;
}
.more-menu.show { display: block; }
.more-head { margin: 6px 12px 8px; font-size: 13px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.more-menu a {
  display: block;
  padding: 14px 16px;
  border-radius: 12px;
  color: var(--text);
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
}
.more-menu a:hover { background: #f1f5f9; transform: translateX(4px); }
.more-menu b { display: block; font-size: 18px; }
.more-menu span { display: block; margin-top: 2px; font-size: 15px; color: #475569; line-height: 1.45; }
.more-menu em { display: block; margin-top: 6px; font-style: normal; font-size: 14px; font-weight: 600; color: var(--blue); }

.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 30;
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(37, 99, 235, 0.35);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.2s, background 0.2s, opacity 0.3s, visibility 0.3s;
}
.to-top.visible { opacity: 1; visibility: visible; }
.to-top:hover { transform: translateY(-3px); background: #1d4ed8; }
.to-top svg { width: 26px; height: 26px; }
.to-top svg path { fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }

.hero { position: relative; min-height: calc(100vh / 0.75); display: grid; align-items: center; color: #fff; background: #071016; }
.hero-video, .hero-shade { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-shade { background: rgba(7, 16, 22, 0.55); }
.hero-copy { position: relative; width: min(1800px, calc(100% - 48px)); margin: 0 auto; text-align: center; }
.hero h1 { margin: 0 auto 22px; font-size: clamp(40px, 5.4vw, 72px); font-weight: 800; line-height: 1.12; }
.hero h1 span { display: block; white-space: nowrap; }
.authors { margin: 0 0 14px; font-size: 32px; font-weight: 500; white-space: nowrap; }
.affils { margin: 0 0 10px; color: #e2e8f0; font-size: 28px; line-height: 1.45; }
.affils sup { font-size: 0.62em; }
.star { margin: 0 0 26px; color: #e2e8f0; font-size: 24px; }
.pills { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #1e293b;
  color: #fff;
  text-decoration: none;
  border-radius: 999px;
  padding: 16px 26px;
  font-weight: 600;
  font-size: 20px;
}
.pill svg { width: 22px; height: 22px; flex: none; }
.pill svg path { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.pill svg.fill path { fill: currentColor; stroke: none; }
a.pill[href]:hover { background: var(--blue); }
.pill.soon {
  background: #b9e6fb;
  color: #0c4a6e;
  cursor: default;
}
.notice {
  position: absolute;
  top: 50%;
  left: calc(75% + 245px);
  z-index: 2;
  display: flex;
  flex-direction: column;
  width: 520px;
  aspect-ratio: 386 / 455;
  transform: translate(-50%, -50%);
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid #b7dff3;
  border-radius: 18px;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.12);
  padding: 28px 28px 32px;
}
.band .notice-title {
  margin: 0 0 16px;
  padding-bottom: 14px;
  border-bottom: 2px solid #b7dff3;
  color: #0f172a;
  font-size: 28px;
  font-weight: 800;
  line-height: 1.2;
  text-align: center;
}
.notice-body { flex: 1; min-height: 0; }
.band .notice-line {
  margin: 4px 0 0;
  color: #0f172a;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.45;
  text-align: left;
}
.hero-note {
  position: absolute;
  left: 22px;
  bottom: 16px;
  margin: 0;
  color: #e2e8f0;
  font-size: 13px;
  text-align: right;
}

.band { position: relative; padding: 72px 0; }
.band + .band { border-top: 2px solid #b7dff3; }
.band strong { color: #0f172a; font-weight: 700; }
.c1 { background: rgba(255, 255, 255, 0.7); }
.c2 { background: rgba(248, 250, 252, 0.66); }
.c3 { background: rgba(238, 246, 255, 0.68); }
.c4 { background: rgba(241, 245, 249, 0.66); }
.c5 { background: rgba(255, 255, 255, 0.68); }
.c6 { background: rgba(248, 250, 252, 0.66); }
.wrap { width: min(980px, calc(100% - 40px)); margin: 0 auto; }
h2 {
  margin: 0 0 26px;
  text-align: center;
  font-size: 40px;
  font-weight: 800;
  position: relative;
  padding-bottom: 16px;
}
h3 { margin: 28px 0 8px; font-size: 26px; font-weight: 700; }
.band p { font-size: 22px; line-height: 1.8; text-align: justify; hyphens: auto; -webkit-hyphens: auto; }
h2::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 64px;
  height: 3px;
  transform: translateX(-50%);
  border-radius: 2px;
}
.c1 h2::after { background: #2563eb; }
.c2 h2::after { background: #0ea5e9; }
.c3 h2::after { background: #7c3aed; }
.c4 h2::after { background: #0891b2; }
.c5 h2::after { background: #0f766e; }
.c6 h2::after { background: #db2777; }
.band p { color: #475569; }
.tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.6;
  vertical-align: 2px;
  white-space: nowrap;
}
.t7 { background: #dbeafe; color: #1d4ed8; }
.t1 { background: #ccfbf1; color: #0f766e; }

.cards {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
  margin: 26px 0 8px;
}
.tab {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  padding: 0 0 12px;
  background: #fff;
  color: var(--text);
  border: 2px solid transparent;
  border-radius: 14px;
  overflow: hidden;
  font: inherit;
  text-align: left;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.tab img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; background: #0b2233; }
.tab b { padding: 0 12px; font-size: 15px; line-height: 1.3; }
.tab .tag { margin: 0 12px; }
.tab:hover { transform: translateY(-3px); box-shadow: 0 10px 22px rgba(15, 23, 42, 0.14); }
.tab.on { border-color: var(--blue); box-shadow: 0 10px 24px rgba(37, 99, 235, 0.25); }

.links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.link-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  color: var(--text);
  text-decoration: none;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.06);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.link-card:hover { transform: translateY(-4px); border-color: var(--blue); box-shadow: 0 14px 28px rgba(15, 23, 42, 0.14); }
.link-card svg { width: 34px; height: 34px; color: #1e293b; }
.link-card svg path { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.link-card svg.fill path { fill: currentColor; stroke: none; }
.link-card b { font-size: 22px; }
.link-card span { font-size: 17px; color: #475569; line-height: 1.5; }

.pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 18px;
  align-items: start;
  margin-top: 8px;
}
.pair p { text-align: justify; }
.pair h3 { margin-top: 0; }
.pair .match { width: 100%; margin: 8px 0 0; }
.pair .match img {
  width: 100%;
  height: 380px;
  object-fit: contain;
  object-position: center;
}
.pair figcaption { text-align: center; }
.plate { margin: 18px 0 0; }
.plate img { width: 100%; height: auto; border-radius: 0; background: #fff; }
.plate figcaption, .fine, footer p { color: var(--muted); font-size: 15px; }
.plate figcaption { margin-top: 10px; }

.screen { max-width: 960px; margin: 22px auto 0; }
.screen video { width: 100%; height: auto; background: #000; aspect-ratio: 16 / 9; border-radius: 14px; box-shadow: 0 16px 36px rgba(15, 23, 42, 0.22); }
.screen figcaption { margin-top: 14px; text-align: center; }
.screen strong { display: block; font-weight: 700; }
.screen figcaption span { color: #475569; }

.table-wrap { overflow-x: auto; margin: 8px 0 16px; }
table.main { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; background: #fff; }
table.main th, table.main td {
  text-align: center;
  padding: 10px 10px;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
  white-space: nowrap;
  color: var(--text);
}
table.main th { color: var(--muted); font-weight: 600; font-size: 14px; }
table.main td:first-child, table.main th:first-child { text-align: left; }
table.main.hard td:nth-child(4), table.main.hard th:nth-child(4) { text-align: left; }
table.main .best { background: #A9D18E; color: #17300f; font-weight: 700; }
table.main .second { background: #E2F0D9; color: #17300f; }

.bib-wrap { position: relative; margin-top: 16px; }
pre {
  margin: 0;
  padding: 18px 18px 56px;
  background: #f1f5f9;
  border: 1px solid var(--line);
  overflow: auto;
  font-size: 18px;
  line-height: 1.6;
  color: var(--text);
}
#copy {
  position: absolute;
  right: 12px;
  bottom: 12px;
  background: var(--blue);
  color: #fff;
  border: 0;
  border-radius: 10px;
  padding: 10px 16px;
  font: inherit;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}
#copy:hover { background: #1d4ed8; transform: translateY(-2px); }
footer { padding: 28px 0 48px; background: #f8fafc; border-top: 1px solid var(--line); }
footer p { margin: 0; }

@media (max-width: 1320px) {
  .rov, .notice { display: none; }
}
@media (max-width: 1000px) {
  .cards { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 720px) {
  .hero h1 { font-size: 32px; }
  .hero h1 span, .authors { white-space: normal; }
  .authors { font-size: 22px; }
  .affils { font-size: 20px; }
  .star { font-size: 18px; }
  .band p { font-size: 18px; }
  .pair, .links { grid-template-columns: 1fr; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .hero-note { position: relative; right: auto; bottom: auto; text-align: center; padding: 18px 16px 0; }
  .more { top: 12px; right: 12px; }
  .more-btn { padding: 10px 14px; font-size: 15px; }
}
@media (prefers-reduced-motion: reduce) {
  .fish, .fish svg, .fish .tail, .bubble { animation: none; }
  .fish, .bubble { display: none; }
}