:root {
  --ink: #101828;
  --muted: #667085;
  --line: rgba(16, 24, 40, 0.12);
  --white: #ffffff;
  --blue: #1664ff;
  --teal: #00b8a9;
  --bg: #f6f8fb;
  --shadow: 0 24px 70px rgba(16, 24, 40, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  line-height: 1.65;
}

body.landing-body {
  background: #000;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 clamp(18px, 5vw, 72px);
  color: var(--white);
  background: linear-gradient(180deg, rgba(8, 17, 38, 0.62), rgba(8, 17, 38, 0));
}

.timeline-body .site-header {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 190px;
}

.brand-image {
  display: block;
  width: auto;
  height: 42px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 800;
}

.site-nav a {
  padding: 9px 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  opacity: 0.86;
  transition: color 0.2s ease, background 0.2s ease, opacity 0.2s ease;
}

.site-nav a:hover,
.site-nav a.active {
  opacity: 1;
  background: rgba(255, 255, 255, 0.12);
}

.video-hero {
  position: relative;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  background: #000;
}

.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-choice-button {
  position: absolute;
  left: 50%;
  bottom: 35vh;
  z-index: 3;
  min-width: 138px;
  height: 42px;
  padding: 0 24px;
  border: 1px solid rgba(255, 255, 255, 0.86);
  border-radius: 999px;
  color: #101828;
  background:
    radial-gradient(circle at 32% 18%, rgba(255, 255, 255, 1), rgba(255, 255, 255, 0.72) 42%, transparent 62%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(236, 246, 255, 0.92) 52%, rgba(255, 255, 255, 0.96));
  box-shadow:
    0 18px 46px rgba(16, 24, 40, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.92),
    inset 0 -10px 24px rgba(22, 100, 255, 0.08);
  backdrop-filter: blur(16px);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  text-decoration: none;
  font: inherit;
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(18px) scale(0.96);
  animation: heroChoiceReveal 0.9s cubic-bezier(0.16, 1, 0.3, 1) 3s forwards;
  transition: transform 0.28s ease, background 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}

.hero-choice-button::after {
  position: absolute;
  inset: -8px;
  content: "";
  border: 1px solid rgba(255, 255, 255, 0.46);
  border-radius: inherit;
  opacity: 0;
  pointer-events: none;
  animation: heroChoicePulse 2.4s ease-out 3.85s infinite;
}

.hero-choice-button:hover,
.hero-choice-button:focus-visible {
  border-color: rgba(255, 255, 255, 0.96);
  background:
    radial-gradient(circle at 30% 12%, #ffffff, rgba(255, 255, 255, 0.82) 42%, transparent 64%),
    linear-gradient(135deg, #ffffff, rgba(229, 242, 255, 0.98) 50%, #ffffff);
  box-shadow:
    0 26px 70px rgba(16, 24, 40, 0.24),
    0 0 0 7px rgba(255, 255, 255, 0.16),
    inset 0 1px 0 rgba(255, 255, 255, 0.98),
    inset 0 -12px 26px rgba(22, 100, 255, 0.1);
  transform: translateX(-50%) translateY(-5px);
}

.hero-choice-button:active {
  transform: translateX(-50%) translateY(-1px) scale(0.99);
}

@keyframes heroChoiceReveal {
  0% {
    opacity: 0;
    pointer-events: none;
    transform: translateX(-50%) translateY(18px) scale(0.96);
  }
  58% {
    opacity: 1;
    transform: translateX(-50%) translateY(-3px) scale(1.02);
  }
  100% {
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0) scale(1);
  }
}

@keyframes heroChoicePulse {
  0% {
    opacity: 0.42;
    transform: scale(0.98);
  }
  70%,
  100% {
    opacity: 0;
    transform: scale(1.24);
  }
}

.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 28px;
  z-index: 2;
  display: grid;
  justify-items: center;
  gap: 12px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 19px;
  font-weight: 800;
  transform: translateX(-50%);
}

.scroll-hint i {
  display: block;
  width: 2px;
  height: 44px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.24);
  border-radius: 999px;
}

.scroll-hint i::after {
  display: block;
  width: 100%;
  height: 16px;
  content: "";
  background: #fff;
  border-radius: inherit;
  animation: cueDrop 1.45s ease-in-out infinite;
}

.timeline-page {
  min-height: 100vh;
  padding-top: 72px;
  background:
    radial-gradient(circle at 10% 8%, rgba(22, 100, 255, 0.13), transparent 28%),
    radial-gradient(circle at 90% 24%, rgba(0, 184, 169, 0.11), transparent 26%),
    linear-gradient(180deg, #ffffff 0%, #f6f8fb 42%, #ffffff 100%);
}

.timeline-hero {
  display: grid;
  place-items: center;
  min-height: 34vh;
  padding: 88px 20px 36px;
  text-align: center;
}

.timeline-statement {
  max-width: 1040px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(26px, 3.8vw, 56px);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: 0;
  text-wrap: balance;
}

.timeline-statement span {
  display: block;
}

.inline-timeline-page {
  padding-top: 0;
}

.timeline-vertical {
  position: relative;
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: 46px 0 120px;
}

.timeline-vertical-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: linear-gradient(180deg, transparent, rgba(22, 100, 255, 0.35), rgba(0, 184, 169, 0.5), transparent);
  transform: translateX(-50%);
}

.timeline-step {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 86px 18px 86px minmax(0, 1fr);
  align-items: center;
  column-gap: 0;
  min-height: 230px;
  opacity: 0;
  transform: translateY(44px);
  transition: opacity 0.65s ease, transform 0.75s cubic-bezier(.18,.9,.24,1.15);
}

.timeline-step.in-view {
  opacity: 1;
  transform: translateY(0);
}

.timeline-step::before {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 2;
  width: 18px;
  height: 18px;
  content: "";
  background: var(--white);
  border: 5px solid var(--blue);
  border-radius: 50%;
  box-shadow: 0 0 0 10px rgba(22, 100, 255, 0.09), 0 18px 42px rgba(22, 100, 255, 0.22);
  transform: translate(-50%, -50%);
}

.timeline-year {
  position: relative;
  z-index: 4;
  color: var(--blue);
  font-size: 18px;
  font-weight: 950;
  line-height: 1;
  writing-mode: horizontal-tb;
  text-orientation: initial;
  pointer-events: none;
}

.timeline-year span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 58px;
  padding: 5px 8px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(22, 100, 255, 0.18);
  border-radius: 999px;
  box-shadow: 0 10px 28px rgba(22, 100, 255, 0.12);
}

.timeline-step.is-left .timeline-year {
  grid-column: 2;
  justify-self: end;
  margin-right: 16px;
  transform: translateY(12px);
}

.timeline-step.is-right .timeline-year {
  grid-column: 4;
  justify-self: start;
  margin-left: 16px;
}

.timeline-node-card {
  width: min(100%, 430px);
  padding: 28px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.timeline-step.is-left .timeline-node-card {
  grid-column: 1;
  justify-self: end;
}

.timeline-step.is-right .timeline-node-card {
  grid-column: 5;
  justify-self: start;
}

.timeline-node-card:hover {
  border-color: rgba(22, 100, 255, 0.28);
  box-shadow: 0 28px 80px rgba(22, 100, 255, 0.16);
  transform: translateY(-4px);
}

.timeline-node-card h2 {
  margin: 0 0 10px;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.18;
}

.timeline-node-card p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.talent-planet-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(26px, 3.6vw, 44px);
  padding: clamp(78px, 8vw, 112px) clamp(16px, 4vw, 54px) clamp(260px, 24vw, 340px);
  overflow: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 76% 18%, rgba(0, 184, 169, 0.09), transparent 30%),
    radial-gradient(circle at 18% 82%, rgba(22, 100, 255, 0.08), transparent 34%),
    linear-gradient(180deg, #ffffff 0%, #f6f8fb 100%);
}

.talent-planet-section::before {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background-image:
    linear-gradient(rgba(16, 24, 40, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 24, 40, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, transparent, #000 18%, #000 82%, transparent);
}

.planet-copy {
  position: relative;
  z-index: 2;
  width: min(100%, 920px);
  text-align: center;
}

.planet-kicker {
  display: none;
}

.planet-copy h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: 0;
}

.planet-copy p:last-child {
  display: none;
}

.planet-stage {
  position: relative;
  z-index: 2;
  display: block;
  width: min(820px, 92vw);
  aspect-ratio: 1 / 1;
  min-height: 0;
  padding: clamp(14px, 2vw, 22px);
  flex: 0 0 auto;
  border-radius: 50%;
  border: 1px solid rgba(16, 24, 40, 0.075);
  background:
    radial-gradient(circle at var(--pointer-x, 50%) var(--pointer-y, 40%), rgba(255, 255, 255, 0.98), rgba(255, 255, 255, 0.7) 30%, rgba(238, 246, 255, 0.76) 68%, rgba(255, 255, 255, 0.92) 100%),
    linear-gradient(145deg, rgba(255, 255, 255, 0.96), rgba(243, 248, 255, 0.82));
  box-shadow:
    0 42px 130px rgba(16, 24, 40, 0.13),
    inset 0 34px 84px rgba(255, 255, 255, 0.82),
    inset 0 -28px 78px rgba(22, 100, 255, 0.07);
  isolation: isolate;
  transform: perspective(1200px) rotateX(var(--tilt-y, 0deg)) rotateY(var(--tilt-x, 0deg));
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
  touch-action: none;
}

.planet-orbit {
  position: absolute;
  inset: clamp(16px, 2.6vw, 28px);
  z-index: 1;
  min-height: 0;
  overflow: hidden;
  border-radius: 50%;
  border: 1px solid rgba(22, 100, 255, 0.08);
  background:
    radial-gradient(circle at calc(50% + var(--scene-x, 0px)) calc(42% + var(--scene-y, 0px)), rgba(255, 255, 255, 0.86), transparent 32%),
    radial-gradient(circle at 50% 72%, rgba(22, 100, 255, 0.055), transparent 42%);
}

.planet-orbit::before,
.planet-orbit::after {
  position: absolute;
  content: "";
  pointer-events: none;
}

.planet-orbit::before {
  inset: 14%;
  border: 1px solid rgba(22, 100, 255, 0.08);
  border-radius: 50%;
  transform: translate3d(calc(var(--scene-x, 0px) * -0.28), calc(var(--scene-y, 0px) * -0.28), 0) rotate(-8deg);
}

.planet-orbit::after {
  left: 11%;
  right: 11%;
  bottom: 10%;
  height: 18%;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(16, 24, 40, 0.13), transparent 70%);
  filter: blur(18px);
  transform: translate3d(calc(var(--scene-x, 0px) * 0.18), calc(var(--scene-y, 0px) * 0.08), 0);
}

.planet-stage::before {
  position: absolute;
  inset: 0;
  content: "";
  border-radius: inherit;
  background: radial-gradient(circle at 50% 12%, rgba(255, 255, 255, 0.68), transparent 20%);
  opacity: 0.9;
  pointer-events: none;
}

.avatar-node {
  position: absolute;
  left: calc(var(--node-x, 50) * 1%);
  top: calc(var(--node-y, 50) * 1%);
  z-index: 4;
  width: 86px;
  height: 86px;
  padding: 0;
  border: 3px solid rgba(255, 255, 255, 0.92);
  border-radius: 50%;
  background: #fff;
  box-shadow:
    0 16px 34px rgba(16, 24, 40, 0.13),
    0 2px 8px rgba(16, 24, 40, 0.08);
  cursor: pointer;
  transform:
    translate3d(calc(-50% + var(--float-x, 0px)), calc(-50% + var(--float-y, 0px)), 0)
    scale(var(--node-scale, 1));
  transition:
    transform 0.42s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.32s ease,
    border-color 0.32s ease,
    filter 0.32s ease,
    opacity 0.32s ease;
  animation: nodeBreathe 8s ease-in-out infinite;
  animation-delay: calc(var(--node-index, 0) * -0.7s);
  will-change: transform;
}

.avatar-node::after {
  position: absolute;
  left: 18%;
  right: 18%;
  bottom: -15%;
  height: 18%;
  content: "";
  border-radius: 50%;
  background: rgba(16, 24, 40, 0.12);
  filter: blur(6px);
  opacity: 0.72;
  pointer-events: none;
}

.avatar-node img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.avatar-node:hover,
.avatar-node.is-active {
  --node-scale: 1.18;
  z-index: 10;
  border-color: rgba(22, 100, 255, 0.72);
  box-shadow:
    0 24px 52px rgba(22, 100, 255, 0.18),
    0 0 0 10px rgba(22, 100, 255, 0.08);
  filter: saturate(1.08);
  animation-play-state: paused;
}

.core-node {
  border-color: rgba(255, 198, 41, 0.92);
  box-shadow:
    0 20px 44px rgba(255, 198, 41, 0.18),
    0 2px 10px rgba(16, 24, 40, 0.1);
}

.planet-profile {
  position: absolute;
  left: 50%;
  top: calc(100% + 24px);
  bottom: auto;
  z-index: 12;
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  align-content: start;
  align-items: start;
  gap: 18px;
  width: min(860px, 94vw);
  min-height: 0;
  max-height: 240px;
  padding: 20px 24px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(16, 24, 40, 0.08);
  border-radius: 24px;
  box-shadow: 0 24px 70px rgba(16, 24, 40, 0.12);
  backdrop-filter: blur(18px);
  transform: translate3d(calc(-50% + var(--scene-x, 0px) * -0.08), calc(var(--scene-y, 0px) * -0.06), 0);
  transition: opacity 0.32s ease, transform 0.42s ease;
  overflow: auto;
}

.planet-profile img {
  width: 86px;
  height: 86px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid rgba(255, 255, 255, 0.94);
  box-shadow: 0 18px 44px rgba(22, 100, 255, 0.14);
}

.planet-profile span {
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
}

.planet-profile h3 {
  margin: 2px 0 8px;
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.2;
}

.planet-profile p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

@keyframes nodeBreathe {
  0%, 100% {
    margin-top: 0;
  }
  50% {
    margin-top: -8px;
  }
}

.academic-force-section {
  position: relative;
  padding: clamp(88px, 9vw, 132px) clamp(16px, 5vw, 72px) clamp(110px, 10vw, 150px);
  overflow: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 74% 18%, rgba(0, 184, 169, 0.08), transparent 30%),
    radial-gradient(circle at 16% 74%, rgba(22, 100, 255, 0.07), transparent 34%),
    linear-gradient(180deg, #f6f8fb 0%, #ffffff 46%, #f6f8fb 100%);
}

.academic-force-section::before {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background-image:
    linear-gradient(rgba(16, 24, 40, 0.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 24, 40, 0.032) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, transparent, #000 16%, #000 86%, transparent);
}

.academic-force-head {
  position: relative;
  z-index: 1;
  width: min(980px, 100%);
  margin: 0 auto clamp(34px, 5vw, 60px);
  text-align: center;
}

.academic-force-head h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.18;
}

.academic-force-head p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.affiliation-panel,
.tutor-panel {
  position: relative;
  z-index: 1;
  width: min(980px, 100%);
  margin: 0 auto;
  border: 1px solid rgba(16, 24, 40, 0.08);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 20px 70px rgba(16, 24, 40, 0.09);
  backdrop-filter: blur(18px);
}

.affiliation-panel {
  padding: 0;
}

.affiliation-panel h3,
.tutor-panel h3 {
  margin: 0;
  font-size: clamp(22px, 2.6vw, 32px);
}

.force-disclosure {
  overflow: hidden;
}

.force-disclosure summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 22px clamp(22px, 4vw, 34px);
  cursor: pointer;
  list-style: none;
}

.force-disclosure summary::-webkit-details-marker {
  display: none;
}

.force-disclosure summary b {
  display: block;
  font-size: clamp(20px, 2.2vw, 28px);
  line-height: 1.25;
}

.force-disclosure summary small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.force-disclosure summary em {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 64px;
  height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  color: var(--blue);
  background: rgba(22, 100, 255, 0.08);
  font-size: 13px;
  font-style: normal;
  font-weight: 900;
}

.force-disclosure[open] summary {
  border-bottom: 1px solid rgba(16, 24, 40, 0.08);
}

.force-disclosure[open] summary em {
  color: var(--muted);
}

.force-disclosure[open] summary em::before {
  content: "收起";
}

.force-disclosure[open] summary em {
  font-size: 0;
}

.force-disclosure[open] summary em::before {
  font-size: 13px;
}

.force-disclosure > h3 {
  display: none;
}

.affiliation-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding: 22px clamp(22px, 4vw, 34px) clamp(22px, 4vw, 34px);
}

.affiliation-grid article {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  min-height: 58px;
  padding: 14px 16px;
  border: 1px solid rgba(16, 24, 40, 0.07);
  border-radius: 16px;
  background: rgba(246, 248, 251, 0.72);
}

.affiliation-grid span {
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.35;
}

.affiliation-grid b {
  color: var(--blue);
  font-size: 13px;
  white-space: nowrap;
}

.tutor-panel {
  margin-top: clamp(24px, 4vw, 42px);
  overflow: hidden;
}

.tutor-panel-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  padding: 22px clamp(22px, 4vw, 34px) 18px;
}

.tutor-panel-head p {
  max-width: 430px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  text-align: right;
}

.tutor-table-wrap {
  max-height: 420px;
  overflow: auto;
  border-top: 1px solid rgba(16, 24, 40, 0.08);
}

.tutor-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.tutor-table th,
.tutor-table td {
  padding: 14px clamp(16px, 3vw, 28px);
  border-bottom: 1px solid rgba(16, 24, 40, 0.07);
  text-align: left;
}

.tutor-table th {
  position: sticky;
  top: 0;
  z-index: 2;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  font-size: 12px;
  font-weight: 900;
}

.tutor-table td:first-child {
  color: var(--ink);
  font-weight: 900;
  white-space: nowrap;
}

.tutor-table td:nth-child(2) {
  color: #344054;
  font-weight: 700;
}

.tutor-table td:nth-child(3) {
  color: var(--muted);
}

.proof-gallery-section {
  position: relative;
  padding: clamp(74px, 8vw, 108px) clamp(16px, 5vw, 72px) clamp(90px, 9vw, 128px);
  overflow: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 78% 20%, rgba(22, 100, 255, 0.08), transparent 32%),
    radial-gradient(circle at 18% 74%, rgba(0, 184, 169, 0.07), transparent 34%),
    linear-gradient(180deg, #ffffff 0%, #f6f8fb 100%);
}

.proof-gallery-section::before {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background-image:
    linear-gradient(rgba(16, 24, 40, 0.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 24, 40, 0.032) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, transparent, #000 18%, #000 86%, transparent);
}

.proof-gallery-head {
  position: relative;
  z-index: 1;
  width: min(980px, 100%);
  margin: 0 auto clamp(26px, 4vw, 42px);
  text-align: center;
}

.proof-gallery-head h2 {
  margin: 0;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.18;
}

.proof-gallery-head p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.proof-gallery-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  width: min(1080px, 100%);
  margin: 0 auto;
}

.proof-card {
  min-width: 0;
  padding: 8px;
  border: 1px solid rgba(16, 24, 40, 0.08);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 18px 50px rgba(16, 24, 40, 0.08);
  backdrop-filter: blur(18px);
}

.proof-image-placeholder {
  display: grid;
  place-items: center;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: 16px;
  border: 1px dashed rgba(22, 100, 255, 0.22);
  background:
    radial-gradient(circle at 68% 24%, rgba(22, 100, 255, 0.09), transparent 38%),
    linear-gradient(145deg, rgba(246, 248, 251, 0.9), rgba(255, 255, 255, 0.92));
}

.proof-image-placeholder span {
  color: rgba(102, 112, 133, 0.7);
  font-size: 13px;
  font-weight: 900;
}

.proof-card img {
  display: block;
  width: 100%;
  aspect-ratio: 5 / 3.35;
  object-fit: contain;
  border-radius: 12px;
  background: rgba(246, 248, 251, 0.8);
}

.proof-card h3 {
  margin: 9px 4px 3px;
  overflow: hidden;
  font-size: 14px;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

@keyframes cueDrop {
  0% {
    transform: translateY(-18px);
    opacity: 0;
  }
  35% {
    opacity: 1;
  }
  100% {
    transform: translateY(46px);
    opacity: 0;
  }
}

@media (max-width: 760px) {
  .site-header {
    min-height: 64px;
    padding: 0 16px;
  }

  .brand {
    min-width: 0;
  }

  .brand-image {
    height: 30px;
  }

  .site-nav a {
    padding: 7px 9px;
  }

  .scroll-hint {
    bottom: 16px;
    font-size: 14px;
  }

  .hero-choice-button {
    bottom: 30vh;
    min-width: 128px;
    height: 40px;
    padding: 0 20px;
    font-size: 14px;
  }

  .timeline-page {
    padding-top: 64px;
  }

  .timeline-hero {
    min-height: 28vh;
  }

  .timeline-vertical {
    width: min(100% - 28px, 620px);
    padding-bottom: 80px;
  }

  .timeline-vertical-line {
    left: 20px;
  }

  .timeline-step {
    grid-template-columns: 96px minmax(0, 1fr);
    min-height: auto;
    margin: 0 0 28px;
  }

  .timeline-step::before {
    left: 20px;
  }

  .timeline-year {
    grid-column: 1 !important;
    justify-self: start !important;
    margin-bottom: 0;
    margin-left: 42px !important;
    margin-right: 0 !important;
    writing-mode: horizontal-tb;
    transform: none;
  }

  .timeline-step.is-left .timeline-year {
    transform: translateY(12px);
  }

  .timeline-step.is-left .timeline-node-card,
  .timeline-step.is-right .timeline-node-card {
    grid-column: 2;
    justify-self: stretch;
  }

  .timeline-node-card {
    padding: 22px;
  }

  .talent-planet-section {
    min-height: auto;
    padding: 68px 16px 82px;
  }

  .planet-stage {
    width: min(100%, 540px);
    padding: 12px;
    border-radius: 50%;
  }

  .planet-orbit {
    min-height: 0;
  }

  .planet-profile {
    top: calc(100% + 18px);
    grid-template-columns: 60px minmax(0, 1fr);
    width: min(94vw, 520px);
    max-height: 260px;
    padding: 14px 16px;
    border-radius: 18px;
    transform: translateX(-50%);
  }

  .planet-profile img {
    width: 60px;
    height: 60px;
  }

  .planet-profile h3 {
    font-size: 20px;
  }

  .planet-profile p {
    grid-column: 1 / -1;
    font-size: 13px;
    line-height: 1.65;
  }

  .academic-force-section {
    padding: 72px 14px 92px;
  }

  .affiliation-panel,
  .tutor-panel {
    border-radius: 20px;
  }

  .affiliation-grid {
    grid-template-columns: 1fr;
  }

  .affiliation-grid article {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .affiliation-grid b {
    white-space: normal;
  }

  .tutor-panel-head {
    display: block;
  }

  .tutor-panel-head p {
    margin-top: 8px;
    text-align: left;
  }

  .tutor-table-wrap {
    max-height: 560px;
  }

  .tutor-table {
    min-width: 620px;
  }

  .proof-gallery-section {
    padding: 72px 14px 92px;
  }

  .proof-gallery-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .proof-card {
    border-radius: 14px;
  }

  .proof-card h3 {
    font-size: 13px;
  }
}

@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;
  }
}

/* 页脚备案号：底部居中、低调，链接工信部供公众查询。
   landing-body 为黑底，故用浅灰文字 + 半透明分隔线，hover 转青色。 */
.site-footer {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 28px 16px calc(28px + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  background: #000;
}

.site-footer .beian-link {
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: color 0.2s ease;
}

.site-footer .beian-link:hover,
.site-footer .beian-link:focus-visible {
  color: var(--teal);
}