:root {
  --ink: #08090b;
  --text: #252932;
  --muted: #6c727c;
  --line: rgba(12, 15, 20, 0.12);
  --glass: rgba(255, 255, 255, 0.62);
  --blue: #0057ff;
  --radius: 28px;
  --shadow: 0 28px 80px rgba(21, 28, 38, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at 20% 5%, rgba(255, 255, 255, 0.96), transparent 30rem),
    radial-gradient(circle at 86% 12%, rgba(205, 212, 222, 0.72), transparent 34rem),
    linear-gradient(135deg, #f8f9fb 0%, #edf0f4 46%, #ffffff 100%);
  letter-spacing: 0;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  background-image:
    linear-gradient(rgba(8, 9, 11, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(8, 9, 11, 0.025) 1px, transparent 1px);
  background-size: 78px 78px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.45), transparent 68%);
}

img {
  display: block;
  width: 100%;
  height: auto;
}

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

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 900px;
  margin-bottom: 18px;
  color: var(--ink);
  font-size: clamp(40px, 6.8vw, 88px);
  line-height: 0.98;
  font-weight: 900;
}

h2 {
  color: var(--ink);
  font-size: clamp(30px, 4.2vw, 56px);
  line-height: 1.08;
  font-weight: 900;
}

h3 {
  color: var(--ink);
  font-size: 22px;
  line-height: 1.25;
}

p {
  font-size: 17px;
  line-height: 1.86;
}

b {
  color: var(--ink);
  font-weight: 900;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1160px, calc(100% - 48px));
  margin: 0 auto;
  padding: 22px 0 14px;
  border-bottom: 1px solid rgba(8, 9, 11, 0.08);
  background: linear-gradient(to bottom, rgba(248, 249, 251, 0.88), rgba(248, 249, 251, 0.52));
  box-shadow: 0 18px 52px rgba(24, 28, 35, 0.04);
  backdrop-filter: blur(28px) saturate(160%);
}

.brand {
  color: var(--ink);
  font-size: 16px;
  font-weight: 900;
  padding-left: 18px;
}

.nav {
  display: flex;
  gap: 2px;
}

.nav a {
  padding: 8px 11px;
  border-radius: 999px;
  color: rgba(8, 9, 11, 0.7);
  font-size: 13px;
  font-weight: 800;
  transition: background 180ms ease, color 180ms ease;
}

.nav a:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.64);
}

main {
  width: min(1160px, calc(100% - 48px));
  margin: 0 auto;
}

.glass-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.76);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.86), rgba(255, 255, 255, 0.46)),
    var(--glass);
  box-shadow: var(--shadow);
  backdrop-filter: blur(28px) saturate(160%);
}

.glass-panel::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.74), transparent 35%, rgba(255, 255, 255, 0.24) 72%, transparent);
  opacity: 0.78;
}

.glass-panel > * {
  position: relative;
  z-index: 1;
}

.hero {
  position: relative;
  min-height: calc(100vh - 86px);
  display: grid;
  align-items: end;
  padding: 28px 0 38px;
}

.hero-portrait {
  position: relative;
  width: 100%;
  min-height: 0;
  margin: 0;
  display: block;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.92);
  border-radius: 44px;
  background:
    radial-gradient(circle at 18% 18%, rgba(255, 255, 255, 0.92), transparent 26rem),
    linear-gradient(145deg, #f8f9fb, #dfe3e9);
  box-shadow: 0 42px 110px rgba(9, 12, 18, 0.14);
}

.hero-portrait::after {
  position: absolute;
  inset: 0;
  content: "";
  background:
    radial-gradient(ellipse at 62% 104%, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.68) 18%, rgba(255, 255, 255, 0.26) 38%, rgba(255, 255, 255, 0.06) 56%, rgba(255, 255, 255, 0) 74%),
    radial-gradient(ellipse at 10% 110%, rgba(255, 255, 255, 0.72) 0%, rgba(255, 255, 255, 0.36) 24%, rgba(255, 255, 255, 0.12) 48%, rgba(255, 255, 255, 0) 70%),
    linear-gradient(to bottom, rgba(247, 248, 250, 0) 0%, rgba(247, 248, 250, 0) 36%, rgba(247, 248, 250, 0.04) 50%, rgba(247, 248, 250, 0.18) 64%, rgba(247, 248, 250, 0.5) 80%, rgba(247, 248, 250, 0.88) 92%, rgba(247, 248, 250, 0.98) 100%);
  pointer-events: none;
}

.hero-portrait img {
  width: 100%;
  height: auto;
  object-fit: initial;
}

.hero-overlay {
  position: absolute;
  z-index: 3;
  left: clamp(24px, 3.4vw, 46px);
  right: clamp(24px, 3.4vw, 46px);
  bottom: clamp(150px, 13vw, 208px);
  width: auto;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
}

.hero-overlay h1 {
  max-width: none;
  margin-bottom: 18px;
  color: var(--ink);
  font-size: clamp(48px, 6.1vw, 88px);
  line-height: 0.98;
  font-weight: 900;
  text-shadow: 0 14px 44px rgba(255, 255, 255, 0.92), 0 18px 60px rgba(8, 9, 11, 0.12);
}

.hero-overlay h1 span {
  display: block;
  white-space: nowrap;
}

.hero-overlay h1 span:last-child {
  width: 100%;
  text-align: justify;
  text-align-last: justify;
}

.hero-subtitle {
  width: min(980px, calc(100% - 56px));
  margin: 44px 0 0 clamp(28px, 5vw, 72px);
  color: rgba(8, 9, 11, 0.82);
  font-size: clamp(14px, 1.15vw, 17px);
  line-height: 1.75;
  font-weight: 700;
}

.hero-subtitle span {
  display: block;
}

.eyebrow,
.section-kicker {
  margin: 0 0 16px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero-overlay .eyebrow {
  display: inline-flex;
  margin-bottom: 14px;
  padding: 7px 11px;
  border: 1px solid rgba(255, 255, 255, 0.58);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.46);
  box-shadow: 0 12px 36px rgba(12, 15, 20, 0.08);
  backdrop-filter: blur(18px) saturate(140%);
}

.section {
  padding: 84px 0;
}

.contact-section {
  display: grid;
  grid-template-columns: 1fr;
  align-items: start;
}

.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  padding-top: 18px;
  padding-bottom: 42px;
}

.stat-card {
  min-height: 196px;
  border-radius: 24px;
  padding: 24px;
}

.stat-card strong {
  display: block;
  margin-bottom: 18px;
  color: var(--ink);
  font-size: clamp(36px, 4.5vw, 62px);
  line-height: 1;
  font-weight: 900;
}

.stat-card strong small {
  margin-left: 5px;
  color: #3b4048;
  font-size: 18px;
  font-weight: 900;
}

.stat-card span {
  color: #424751;
  font-size: 15px;
  line-height: 1.62;
  font-weight: 800;
}

.prose-section {
  padding-top: 36px;
}

.prose {
  width: min(1080px, calc(100% - 64px));
  margin: 0 auto;
}

.prose p {
  margin-bottom: 24px;
  color: #30353d;
  font-size: clamp(18px, 1.55vw, 22px);
  line-height: 1.9;
}

.prose .prose-quote {
  margin-top: 52px;
  color: var(--ink);
  font-size: clamp(34px, 3.1vw, 46px);
  line-height: 1.24;
  font-weight: 900;
}

.work-table-section {
  padding-top: 40px;
}

.work-table {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-radius: 34px;
}

.work-table article {
  min-height: 430px;
  padding: clamp(24px, 3.4vw, 40px);
  border-left: 1px solid var(--line);
}

.work-table article:first-child {
  border-left: 0;
}

.work-table h2 {
  margin-bottom: 30px;
  font-size: clamp(25px, 3vw, 38px);
}

.work-table h3 {
  margin: 24px 0 8px;
  font-size: 18px;
}

.work-table p {
  margin-bottom: 12px;
  color: #424851;
}

.work-emoji {
  margin-top: 52px;
  color: var(--ink);
  font-size: clamp(42px, 6vw, 72px);
  font-weight: 900;
}

.section-heading {
  max-width: 820px;
  margin-bottom: 34px;
}

.section-heading p {
  color: var(--muted);
}

.cooperation .section-heading {
  max-width: 1120px;
}

.cooperation .section-heading p {
  white-space: nowrap;
}

.communication-list {
  display: grid;
  gap: 14px;
}

.communication-list article {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 28px;
  align-items: center;
  border-radius: 24px;
  padding: 26px 30px;
}

.communication-list article > strong {
  color: var(--ink);
  font-size: clamp(30px, 4vw, 50px);
  line-height: 1;
  font-weight: 900;
}

.communication-list p {
  margin: 0;
  color: #353a43;
  font-size: clamp(16px, 1.6vw, 20px);
}

.course-story {
  display: grid;
  gap: 18px;
}

.course-section {
  padding-bottom: 0;
}

.long-card,
.idea-panel {
  border-radius: 34px;
  padding: clamp(28px, 5vw, 56px);
}

.long-card h3 {
  margin-bottom: 24px;
  font-size: clamp(26px, 3.2vw, 42px);
}

.long-card p,
.idea-panel p {
  margin-bottom: 22px;
  color: #39404a;
  font-size: clamp(17px, 1.75vw, 20px);
  line-height: 1.9;
}

.proof-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.embedded-gallery {
  margin-top: 34px;
}

.idea-section {
  padding-top: 18px;
}

.media-card {
  margin: 0;
  border-radius: var(--radius);
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.58);
}

.media-card.wide {
  grid-column: 1 / -1;
}

.media-card img {
  border-radius: 18px;
  background: #fff;
}

.media-card figcaption {
  padding: 10px 8px 16px;
  color: #20242a;
  font-size: 17px;
  font-weight: 900;
}

.idea-panel h2 {
  max-width: 980px;
  margin-bottom: 30px;
  font-size: clamp(26px, 3.2vw, 42px);
}

.cooperation-table {
  border-radius: 30px;
}

.table-row {
  display: grid;
  grid-template-columns: 0.72fr 1.68fr 0.78fr;
  gap: 22px;
  align-items: start;
  padding: 24px 28px;
  border-top: 1px solid var(--line);
}

.table-row:first-child {
  border-top: 0;
}

.table-row h3,
.table-row p,
.table-row strong {
  margin: 0;
}

.table-row p {
  color: #4d535e;
  font-size: 16px;
  line-height: 1.72;
}

.table-row strong {
  color: var(--ink);
  font-size: 16px;
  line-height: 1.75;
}

.table-row small {
  color: #5e6570;
  font-size: 13px;
  font-weight: 700;
}

.table-head {
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
}

.contact-section {
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 72px;
  align-items: start;
  padding-top: 72px;
  padding-bottom: 72px;
}

.contact-copy {
  max-width: 650px;
}

.contact-links {
  display: grid;
  gap: 8px;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid rgba(8, 9, 11, 0.1);
}

.contact-links p {
  display: grid;
  grid-template-columns: 128px 1fr;
  column-gap: 14px;
  align-items: baseline;
  margin: 0;
  color: #565d67;
  font-size: 14px;
  line-height: 1.7;
}

.contact-links span {
  display: block;
  min-width: 0;
  color: #8a9099;
  font-weight: 800;
}

.contact-links strong,
.contact-links a {
  color: var(--ink);
  font-weight: 900;
}

.contact-links a {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.wechat-card {
  width: 320px;
  justify-self: end;
  margin: 0;
  border-radius: 28px;
  padding: 12px;
}

.wechat-card img {
  border-radius: 20px;
}

.wechat-card figcaption {
  padding: 14px 8px 4px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 900;
  text-align: center;
}

.life-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.life-card {
  min-height: 260px;
  border-radius: 24px;
  padding: 28px;
}

.life-card h3 {
  margin-bottom: 18px;
}

.life-card p {
  margin-bottom: 9px;
  color: #505660;
  line-height: 1.72;
}

.life-more {
  display: flex;
  align-items: center;
}

.life-more h3 {
  max-width: none;
  margin: 0;
  font-size: clamp(30px, 3.5vw, 50px);
  line-height: 1.05;
  white-space: nowrap;
}

.ted-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.62fr);
  gap: 56px;
  align-items: center;
}

.ted-copy {
  max-width: 690px;
}

.ted-copy p:last-child {
  color: #4f5661;
  font-size: clamp(17px, 1.6vw, 21px);
  line-height: 1.85;
}

.ted-cover {
  position: relative;
  display: block;
  width: min(360px, 100%);
  justify-self: end;
  padding: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.82);
  border-radius: 30px;
  background: #fff;
  box-shadow: 0 32px 90px rgba(21, 28, 38, 0.14);
  cursor: pointer;
}

.ted-cover img {
  aspect-ratio: 3 / 4;
  object-fit: cover;
  transition: transform 220ms ease, filter 220ms ease;
}

.ted-cover:hover img {
  transform: scale(1.025);
  filter: brightness(0.96);
}

.play-button {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 18px 50px rgba(8, 9, 11, 0.22);
  backdrop-filter: blur(18px) saturate(160%);
  transform: translate(-50%, -50%);
}

.play-button::after {
  position: absolute;
  left: 29px;
  top: 23px;
  width: 0;
  height: 0;
  content: "";
  border-top: 13px solid transparent;
  border-bottom: 13px solid transparent;
  border-left: 19px solid var(--ink);
}

.video-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 28px;
  background: rgba(8, 9, 11, 0.72);
  backdrop-filter: blur(18px);
}

.video-modal[hidden] {
  display: none;
}

.ted-video {
  max-width: min(430px, 92vw);
  max-height: 86vh;
  border-radius: 24px;
  background: #000;
  box-shadow: 0 32px 90px rgba(0, 0, 0, 0.38);
}

.video-close {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 101;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  color: #fff;
  font: inherit;
  font-size: 14px;
  font-weight: 900;
  background: rgba(255, 255, 255, 0.14);
  cursor: pointer;
  backdrop-filter: blur(16px);
}

body.modal-open {
  overflow: hidden;
}

.final-note {
  width: min(1080px, calc(100% - 64px));
  margin: 70px auto 120px;
  padding: 44px 0 0;
  border-top: 1px solid rgba(8, 9, 11, 0.12);
  text-align: center;
}

.final-note p {
  margin-bottom: 16px;
  color: #747a84;
  font-size: 14px;
  font-weight: 900;
}

.final-note h2 {
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 0;
  font-size: clamp(30px, 4vw, 58px);
  line-height: 1.12;
}

@media (max-width: 980px) {
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-bottom: 44px;
  }

  .hero-portrait {
    min-height: auto;
  }

  .hero-portrait img {
    height: auto;
  }

  .hero-overlay {
    position: absolute;
    left: 4%;
    right: 4%;
    bottom: 13.5%;
    width: auto;
    margin: 0;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
  }

  .hero-overlay h1 {
    color: var(--ink);
    font-size: clamp(28px, 6.5vw, 46px);
    text-shadow: 0 12px 34px rgba(255, 255, 255, 0.94), 0 12px 34px rgba(8, 9, 11, 0.08);
  }

  .stats-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .work-table {
    grid-template-columns: 1fr;
  }

  .work-table article {
    min-height: auto;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .work-table article:first-child {
    border-top: 0;
  }

  .wechat-card {
    justify-self: start;
  }

  .ted-section {
    grid-template-columns: 1fr;
  }

  .ted-cover {
    justify-self: start;
  }
}

@media (max-width: 720px) {
  .site-header {
    top: 0;
    width: min(100% - 20px, 1180px);
    margin-top: 0;
    padding: 16px 0 12px;
  }

  .nav a {
    padding: 8px 7px;
    font-size: 12px;
  }

  main {
    width: min(100% - 20px, 1220px);
  }

  .hero {
    padding-top: 22px;
    padding-bottom: 22px;
  }

  .hero-portrait {
    border-radius: 28px;
  }

  .hero-overlay {
    left: 4.2%;
    right: 4.2%;
    bottom: 94px;
    width: auto;
    margin: 0;
    padding: 0;
  }

  .hero-overlay h1 {
    font-size: clamp(20px, 5.3vw, 28px);
    line-height: 1;
    margin-bottom: 0;
  }

  .hero-overlay .eyebrow {
    display: none;
  }

  .hero-subtitle {
    width: calc(100% - 28px);
    margin: 18px auto 0;
    max-width: none;
    font-size: 11px;
    line-height: 1.5;
  }

  h1 {
    font-size: clamp(38px, 11vw, 54px);
  }

  h2 {
    font-size: 30px;
    line-height: 1.14;
  }

  p {
    font-size: 16px;
    line-height: 1.75;
  }

  .section {
    padding: 44px 0;
  }

  .stats-strip,
  .proof-gallery,
  .life-grid {
    grid-template-columns: 1fr;
  }

  .stats-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    padding-top: 18px;
    padding-bottom: 30px;
  }

  .stat-card {
    min-height: 132px;
    padding: 18px;
    border-radius: 20px;
  }

  .stat-card strong {
    margin-bottom: 12px;
    font-size: clamp(32px, 10vw, 44px);
  }

  .stat-card strong small {
    font-size: 13px;
  }

  .stat-card span {
    font-size: 12px;
    line-height: 1.5;
  }

  .prose .prose-quote {
    margin-top: 34px;
    font-size: 26px;
    line-height: 1.26;
  }

  .prose {
    width: calc(100% - 28px);
    margin: 0 auto;
  }

  .prose p,
  .long-card p,
  .idea-panel p,
  .contact-copy p,
  .ted-copy p:last-child {
    font-size: 16px;
    line-height: 1.78;
  }

  .long-card,
  .idea-panel {
    padding: 26px 22px;
    border-radius: 24px;
  }

  .long-card h3,
  .idea-panel h2 {
    margin-bottom: 18px;
    font-size: 25px;
    line-height: 1.18;
  }

  .work-table h2 {
    margin-bottom: 16px;
    font-size: 21px;
  }

  .work-table h3,
  .life-card h3 {
    font-size: 19px;
  }

  .work-table p,
  .life-card p,
  .table-row p,
  .contact-links p {
    font-size: 15px;
    line-height: 1.7;
  }

  .work-table article {
    padding: 22px 20px;
  }

  .work-emoji {
    margin-top: 24px;
    font-size: 38px;
  }

  .communication-list article {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 22px;
  }

  .communication-list article > strong {
    font-size: 28px;
  }

  .communication-list p {
    font-size: 16px;
    line-height: 1.75;
  }

  .table-head {
    display: none;
  }

  .table-row {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 24px 22px;
  }

  .table-row h3 {
    font-size: 20px;
  }

  .table-row strong {
    font-size: 15px;
  }

  .idea-section {
    padding-top: 18px;
  }

  .cooperation .section-heading p {
    white-space: normal;
    font-size: 15px;
    line-height: 1.7;
  }

  .contact-section {
    gap: 20px;
  }

  .contact-copy h2,
  .ted-copy h2 {
    font-size: 30px;
  }

  .contact-links p {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .life-card {
    min-height: auto;
    padding: 24px 22px;
    border-radius: 22px;
  }

  .life-more h3 {
    font-size: 28px;
  }

  .final-note {
    width: 100%;
    margin: 46px auto 80px;
    padding-top: 30px;
  }

  .final-note h2 {
    font-size: 25px;
    line-height: 1.18;
  }

  .wechat-card {
    width: 100%;
  }

  .ted-section {
    gap: 24px;
  }

  .ted-cover {
    width: min(320px, 100%);
  }
}

@media (max-width: 430px) {
  .brand {
    max-width: 156px;
    font-size: 14px;
    line-height: 1.15;
  }

  .nav {
    overflow-x: auto;
    max-width: 78vw;
  }

  .nav a {
    flex: 0 0 auto;
  }
}