:root {
  --navy-950: #071420;
  --navy-900: #0b1d2a;
  --navy-800: #173045;
  --cobalt: #416f78;
  --cyan: #91d0ca;
  --lime: #cedbbb;
  --sand: #d7c7a3;
  --ice: #edf4f3;
  --slate: #99adb1;
  --line: rgba(221, 237, 232, 0.17);
  --line-strong: rgba(221, 237, 232, 0.28);
  --panel: rgba(10, 28, 42, 0.73);
  --panel-strong: rgba(13, 35, 52, 0.88);
  --shadow: 0 28px 90px rgba(1, 8, 16, 0.34);
  --shadow-soft: 0 18px 55px rgba(1, 8, 16, 0.22);
  --radius-lg: 30px;
  --radius-md: 22px;
  --display: "Space Grotesk", Arial, sans-serif;
  --body: "IBM Plex Sans", Arial, sans-serif;
  --mono: "IBM Plex Mono", monospace;
  color-scheme: dark;
  font-synthesis: none;
}

[data-theme="light"] {
  --navy-950: #eef5f2;
  --navy-900: #e3ede9;
  --navy-800: #ccdcd7;
  --cobalt: #4f7477;
  --cyan: #2f7f7a;
  --lime: #586f4a;
  --sand: #8b7149;
  --ice: #071520;
  --slate: #53676b;
  --line: rgba(8, 30, 41, 0.17);
  --line-strong: rgba(8, 30, 41, 0.28);
  --panel: rgba(248, 251, 248, 0.76);
  --panel-strong: rgba(248, 251, 248, 0.92);
  --shadow: 0 28px 90px rgba(38, 57, 64, 0.18);
  --shadow-soft: 0 18px 55px rgba(38, 57, 64, 0.13);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
  background: var(--navy-950);
}

body {
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 11% 10%, rgba(145, 208, 202, 0.16), transparent 28rem),
    radial-gradient(circle at 88% 6%, rgba(206, 219, 187, 0.11), transparent 30rem),
    linear-gradient(180deg, var(--navy-950) 0%, var(--navy-900) 52%, var(--navy-950) 100%);
  color: var(--ice);
  font-family: var(--body);
  transition: background-color 300ms ease, color 300ms ease;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: 0.18;
  background-image:
    linear-gradient(rgba(145, 208, 202, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(145, 208, 202, 0.08) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black, transparent 76%);
}

body::after {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: 0.5;
  background:
    linear-gradient(90deg, transparent calc(50% - 1px), rgba(215, 199, 163, 0.16) calc(50% - 1px), rgba(215, 199, 163, 0.16) calc(50% + 1px), transparent calc(50% + 1px)),
    radial-gradient(circle at 50% 44%, transparent 0 7.6rem, rgba(145, 208, 202, 0.11) 7.65rem 7.72rem, transparent 7.8rem),
    radial-gradient(circle at 50% 44%, transparent 0 14.8rem, rgba(206, 219, 187, 0.08) 14.86rem 14.93rem, transparent 15rem);
  mask-image: linear-gradient(to bottom, transparent, black 14%, black 56%, transparent);
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

::selection {
  background: var(--lime);
  color: #081725;
}

:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 5px;
}

.skip-link {
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 100;
  padding: 10px 14px;
  color: #081725;
  background: var(--lime);
  font-family: var(--mono);
  font-size: 0.75rem;
  transform: translateY(-160%);
}

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

.site-header {
  position: absolute;
  inset: 18px 0 auto;
  z-index: 10;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: min(100% - 72px, 1500px);
  margin: 0 auto;
  padding: 15px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--panel-strong) 74%, transparent);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(22px);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  justify-self: start;
  font-family: var(--display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.wordmark-mark {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: rgba(145, 208, 202, 0.08);
  box-shadow: inset 0 0 20px rgba(145, 208, 202, 0.08);
  color: var(--lime);
  font-family: var(--mono);
  font-weight: 500;
}

.footer-mark {
  color: var(--lime);
  font-family: var(--mono);
  font-weight: 500;
}

.nav-links {
  display: flex;
  gap: 8px;
}

.nav-links a,
.footer-links a {
  position: relative;
  font-family: var(--mono);
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links a {
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: border-color 180ms ease, background 180ms ease, color 180ms ease;
}

.nav-links a:hover {
  border-color: var(--line);
  background: rgba(145, 208, 202, 0.08);
  color: var(--ice);
}

.nav-links a::after,
.footer-links a::after {
  position: absolute;
  right: 0;
  bottom: -6px;
  left: 0;
  height: 1px;
  content: "";
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 220ms ease;
}

.nav-links a:hover::after,
.footer-links a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-links a::after {
  display: none;
}

.header-meta {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: 14px;
}

.availability {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--slate);
  font-family: var(--mono);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.availability i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(196, 212, 174, 0.12);
}

.language-switch {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(145, 208, 202, 0.055);
  color: var(--slate);
  font-family: var(--mono);
  font-size: 1rem;
}

.language-option {
  padding: 4px 1px;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: color 180ms ease;
}

.language-option:hover,
.language-option.is-active {
  color: var(--lime);
}

html[lang="zh-CN"] body {
  font-family: "Noto Sans SC", "Microsoft YaHei", var(--body);
}

html[lang="zh-CN"] .hero h1,
html[lang="zh-CN"] .profile-statement,
html[lang="zh-CN"] .journey-heading h2,
html[lang="zh-CN"] .practice-heading h2,
html[lang="zh-CN"] .contact h2,
html[lang="zh-CN"] .timeline-main h3,
html[lang="zh-CN"] .distinction-grid strong,
html[lang="zh-CN"] .card-copy h3,
html[lang="zh-CN"] .contact-link {
  font-family: "Noto Sans SC", "Microsoft YaHei", var(--display);
  letter-spacing: -0.04em;
}

html[lang="zh-CN"] .hero h1 {
  line-height: 0.98;
}

html[lang="zh-CN"] .profile-statement,
html[lang="zh-CN"] .current-body h2,
html[lang="zh-CN"] .journey-heading h2,
html[lang="zh-CN"] .practice-heading h2,
html[lang="zh-CN"] .contact h2 {
  line-height: 1.08;
}

html[lang="zh-CN"] .profile-detail p,
html[lang="zh-CN"] .current-card p,
html[lang="zh-CN"] .timeline-main > p:last-child,
html[lang="zh-CN"] .card-copy p {
  line-height: 1.9;
}

html[lang="zh-CN"] .nav-links a,
html[lang="zh-CN"] .availability,
html[lang="zh-CN"] .kicker,
html[lang="zh-CN"] .section-rail p,
html[lang="zh-CN"] .timeline-type,
html[lang="zh-CN"] .contact-meta p {
  letter-spacing: 0.04em;
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(145, 208, 202, 0.055);
  color: var(--ice);
  font-family: var(--mono);
  font-size: 0.92rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  cursor: pointer;
}

.toggle-track {
  position: relative;
  width: 27px;
  height: 14px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(7, 20, 32, 0.26);
}

.toggle-track i {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  transition: transform 250ms ease;
}

[data-theme="light"] .toggle-track i {
  transform: translateX(13px);
}

.hero {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: 70px minmax(0, 1.05fr) minmax(420px, 0.82fr);
  align-items: center;
  min-height: 100svh;
  width: min(100% - 72px, 1500px);
  margin: 0 auto;
  padding: 148px 0 78px;
  gap: clamp(28px, 4vw, 70px);
}

.hero::before {
  position: absolute;
  top: 19%;
  left: 8%;
  z-index: -1;
  width: min(58vw, 760px);
  height: min(34vw, 430px);
  border-top: 1px solid rgba(215, 199, 163, 0.24);
  border-right: 1px solid rgba(145, 208, 202, 0.18);
  content: "";
  opacity: 0.75;
  transform: skewY(-9deg);
}

.hero-index {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 80px;
  position: relative;
  padding-right: 18px;
  color: var(--slate);
  font-family: var(--mono);
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.hero-index::after {
  position: absolute;
  top: 12%;
  right: 0;
  bottom: 12%;
  width: 1px;
  content: "";
  background: linear-gradient(to bottom, transparent, var(--line-strong), transparent);
}

.kicker {
  margin: 0 0 22px;
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 820px;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(4.7rem, 8.2vw, 9.2rem);
  font-weight: 500;
  letter-spacing: -0.075em;
  line-height: 0.82;
  text-shadow: 0 20px 70px rgba(1, 8, 16, 0.36);
}

.headline-shift {
  display: inline-block;
  color: transparent;
  background: linear-gradient(105deg, var(--lime), var(--cyan) 72%);
  background-clip: text;
  font-weight: 400;
  transform: translateX(clamp(28px, 6vw, 100px));
  -webkit-background-clip: text;
}

.headline-tail {
  display: inline-block;
}

.hero-summary {
  display: grid;
  grid-template-columns: minmax(220px, 420px) auto;
  align-items: end;
  margin-top: 54px;
  gap: 40px;
}

.hero-summary p {
  margin: 0;
  padding-left: 20px;
  border-left: 1px solid var(--line-strong);
  color: var(--slate);
  font-size: clamp(1rem, 1.25vw, 1.16rem);
  line-height: 1.65;
}

.primary-link,
.hero-contact {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 14px 20px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(145, 208, 202, 0.08);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  transition: border-color 180ms ease, background 180ms ease, transform 180ms ease;
}

.primary-link span,
.hero-contact span {
  color: var(--lime);
  font-size: 1rem;
  transition: transform 200ms ease;
}

.primary-link:hover span {
  transform: translateY(4px);
}

.primary-link:hover,
.hero-contact:hover {
  border-color: rgba(145, 208, 202, 0.44);
  background: rgba(145, 208, 202, 0.14);
}

.hero-contact:hover span {
  transform: translate(3px, -3px);
}

.signal-stage {
  position: relative;
  align-self: center;
  height: min(66vh, 680px);
  min-height: 490px;
  overflow: hidden;
  border: 1px solid rgba(145, 208, 202, 0.24);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 58% 48%, rgba(206, 219, 187, 0.17), transparent 13rem),
    radial-gradient(circle at 18% 12%, rgba(145, 208, 202, 0.15), transparent 16rem),
    linear-gradient(160deg, rgba(145, 208, 202, 0.12), transparent 42%),
    var(--panel-strong);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.07);
  cursor: crosshair;
}

.signal-stage::before,
.signal-stage::after {
  position: absolute;
  z-index: 0;
  pointer-events: none;
  content: "";
}

.signal-stage::before {
  top: 18%;
  left: 16%;
  width: 64%;
  height: 54%;
  border: 1px solid rgba(206, 219, 187, 0.16);
  border-radius: 50%;
  opacity: 0.75;
  transform: rotate(-14deg);
  box-shadow:
    0 0 0 38px rgba(145, 208, 202, 0.035),
    0 0 0 78px rgba(206, 219, 187, 0.025);
}

.signal-stage::after {
  inset: 0;
  background:
    linear-gradient(132deg, transparent 0 49.85%, rgba(215, 199, 163, 0.14) 49.95% 50.05%, transparent 50.15%),
    radial-gradient(circle at 56% 48%, rgba(206, 219, 187, 0.16) 0 2px, transparent 3px);
}

.signal-header,
.signal-readout {
  position: absolute;
  right: 0;
  left: 0;
  z-index: 4;
  display: flex;
  justify-content: space-between;
  padding: 15px 18px;
  color: var(--slate);
  font-family: var(--mono);
  font-size: 0.95rem;
  letter-spacing: 0.09em;
}

.signal-header {
  top: 0;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 20, 32, 0.36);
  backdrop-filter: blur(12px);
}

.signal-readout {
  bottom: 0;
  justify-content: flex-start;
  gap: 24px;
  border-top: 1px solid var(--line);
  background: rgba(7, 20, 32, 0.36);
  backdrop-filter: blur(12px);
}

.signal-readout b {
  color: var(--ice);
  font-weight: 400;
}

.signal-grid {
  position: absolute;
  inset: 56px 22px 58px;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-template-rows: repeat(9, 1fr);
  overflow: hidden;
  border: 1px solid rgba(221, 237, 232, 0.08);
  border-radius: calc(var(--radius-lg) - 12px);
}

.signal-cell {
  position: relative;
  border-right: 1px solid rgba(145, 208, 202, 0.065);
  border-bottom: 1px solid rgba(145, 208, 202, 0.065);
}

.signal-cell::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: var(--size, 3px);
  height: var(--size, 3px);
  border-radius: 50%;
  content: "";
  background: var(--cell-color, var(--cyan));
  opacity: var(--opacity, 0.25);
  transform: translate(-50%, -50%);
  box-shadow: 0 0 var(--glow, 0) var(--cell-color, var(--cyan));
  transition: width 180ms ease, height 180ms ease, opacity 180ms ease, box-shadow 180ms ease;
}

.signal-crosshair {
  position: absolute;
  inset: 56px 22px 58px;
  z-index: 3;
  pointer-events: none;
}

.crosshair-x,
.crosshair-y {
  position: absolute;
  display: block;
  background: rgba(196, 212, 174, 0.45);
}

.crosshair-x {
  top: 48%;
  right: 0;
  left: 0;
  height: 1px;
}

.crosshair-y {
  top: 0;
  bottom: 0;
  left: 56%;
  width: 1px;
}

.signal-crosshair i {
  position: absolute;
  top: 48%;
  left: 56%;
  width: 12px;
  height: 12px;
  border: 1px solid var(--lime);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 18px rgba(196, 212, 174, 0.45);
}

.signal-caption {
  position: absolute;
  right: 18px;
  bottom: 72px;
  z-index: 4;
  max-width: 210px;
  margin: 0;
  padding: 10px 12px;
  border: 1px solid rgba(221, 237, 232, 0.12);
  border-radius: 16px;
  background: rgba(7, 20, 32, 0.32);
  color: var(--slate);
  font-family: var(--mono);
  font-size: 0.92rem;
  line-height: 1.55;
  text-align: right;
  text-transform: uppercase;
}

.hero-contact {
  position: absolute;
  right: 0;
  bottom: 24px;
}

.ticker {
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(40, 78, 89, 0.86), rgba(33, 55, 66, 0.94), rgba(55, 74, 70, 0.86)),
    var(--navy-900);
  color: var(--ice);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.ticker-track {
  display: flex;
  align-items: center;
  width: max-content;
  padding: 14px 0;
  animation: ticker 34s linear infinite;
}

.ticker span {
  padding: 0 25px;
  font-family: var(--mono);
  font-size: 1rem;
  letter-spacing: 0.12em;
}

.ticker i {
  color: var(--sand);
  font-style: normal;
}

@keyframes ticker {
  to { transform: translateX(-50%); }
}

.section-wrap {
  display: grid;
  grid-template-columns: minmax(160px, 0.28fr) minmax(0, 1fr);
  width: min(100% - 72px, 1500px);
  margin: 0 auto;
  gap: clamp(40px, 8vw, 140px);
}

.profile {
  position: relative;
  padding: clamp(110px, 13vw, 190px) 0;
  background: linear-gradient(180deg, transparent, rgba(145, 208, 202, 0.035) 44%, transparent);
}

.section-rail {
  position: relative;
  align-self: stretch;
  padding-top: 7px;
  border-right: 0;
}

.section-rail::before {
  position: absolute;
  top: 8px;
  right: 0;
  bottom: 0;
  width: 1px;
  content: "";
  background: linear-gradient(to bottom, var(--line-strong), transparent);
}

.section-rail::after {
  position: absolute;
  top: 3px;
  right: -4px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  content: "";
  background: var(--sand);
  box-shadow: 0 0 0 6px rgba(215, 199, 163, 0.1);
}

.section-rail p,
.section-rail span {
  margin: 0;
  font-family: var(--mono);
  font-size: 1rem;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.section-rail p {
  color: var(--cyan);
}

.section-rail span {
  display: block;
  margin-top: 9px;
  color: var(--slate);
  letter-spacing: 0.03em;
  text-transform: none;
}

.profile-statement {
  max-width: 1050px;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(2.7rem, 5.25vw, 6.1rem);
  font-weight: 400;
  letter-spacing: -0.055em;
  line-height: 1.02;
}

.profile-detail {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  max-width: 850px;
  margin: 68px 0 0 auto;
  gap: clamp(35px, 6vw, 85px);
}

.profile-detail p {
  margin: 0;
  color: var(--slate);
  font-size: 1rem;
  line-height: 1.75;
}

.working-code {
  display: grid;
  grid-template-columns: 1.15fr repeat(3, 1fr);
  margin-top: 100px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(145, 208, 202, 0.075), transparent 44%),
    var(--panel);
  box-shadow: var(--shadow-soft);
}

.working-code > * {
  min-height: 150px;
  margin: 0;
  padding: 22px;
  border-right: 1px solid var(--line);
}

.working-code > *:last-child {
  border-right: 0;
}

.working-code-label,
.working-code span {
  color: var(--slate);
  font-family: var(--mono);
  font-size: 0.95rem;
  letter-spacing: 0.1em;
}

.working-code div {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 30px;
}

.working-code strong {
  max-width: 180px;
  font-family: var(--display);
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.18;
}

.now-building {
  padding: clamp(90px, 10vw, 150px) 0;
  border-top: 1px solid var(--line);
}

.current-body h2 {
  max-width: 920px;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(3rem, 5.8vw, 6.8rem);
  font-weight: 500;
  letter-spacing: -0.065em;
  line-height: 0.95;
}

.current-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: clamp(42px, 6vw, 78px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 0%, rgba(103, 170, 146, 0.1), transparent 22rem),
    rgba(8, 22, 34, 0.6);
  box-shadow: var(--shadow-soft);
}

.current-card {
  position: relative;
  min-height: 370px;
  padding: clamp(28px, 4vw, 48px);
  isolation: isolate;
}

.current-card + .current-card {
  border-left: 1px solid var(--line);
}

.current-card::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0.68;
  content: "";
}

.current-card--fengshui::before {
  background:
    linear-gradient(135deg, rgba(103, 170, 146, 0.18), transparent 52%),
    repeating-linear-gradient(90deg, rgba(232, 221, 199, 0.045) 0 1px, transparent 1px 42px);
}

.current-card--quant::before {
  background:
    linear-gradient(135deg, rgba(47, 140, 255, 0.16), transparent 52%),
    repeating-linear-gradient(0deg, rgba(145, 208, 202, 0.045) 0 1px, transparent 1px 38px);
}

.current-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: var(--sand);
  font-family: var(--mono);
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.current-card-top i {
  width: 42px;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--cyan));
}

.current-card h3 {
  margin: clamp(58px, 7vw, 92px) 0 20px;
  font-family: var(--display);
  font-size: clamp(2.4rem, 4.2vw, 5.2rem);
  font-weight: 500;
  letter-spacing: -0.06em;
  line-height: 0.95;
}

.current-card p {
  max-width: 540px;
  margin: 0;
  color: var(--slate);
  font-size: clamp(1.04rem, 1.4vw, 1.25rem);
  line-height: 1.7;
}

.current-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 34px;
}

.current-tags span {
  padding: 8px 12px;
  border: 1px solid rgba(145, 208, 202, 0.22);
  border-radius: 999px;
  color: var(--ice);
  background: rgba(145, 208, 202, 0.07);
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.journey {
  position: relative;
  padding: clamp(110px, 13vw, 180px) 0;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(circle at 12% 8%, rgba(215, 199, 163, 0.08), transparent 26rem),
    linear-gradient(180deg, rgba(145, 208, 202, 0.035), transparent 38%),
    var(--navy-900);
}

.journey-heading h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(3.2rem, 6vw, 7rem);
  font-weight: 500;
  letter-spacing: -0.065em;
  line-height: 0.94;
}

.timeline {
  width: min(100% - 72px, 1500px);
  margin: 90px auto 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(10, 28, 42, 0.46);
  box-shadow: var(--shadow-soft);
}

.timeline-entry {
  display: grid;
  grid-template-columns: minmax(170px, 0.28fr) minmax(0, 1fr) auto;
  align-items: start;
  min-height: 190px;
  padding: 32px;
  border-bottom: 1px solid var(--line);
  gap: clamp(30px, 7vw, 120px);
  transition: background 180ms ease;
}

.timeline-entry:hover {
  background: rgba(145, 208, 202, 0.045);
}

.timeline-date,
.timeline-place,
.timeline-type {
  margin: 0;
  color: var(--slate);
  font-family: var(--mono);
  font-size: 0.95rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.timeline-main h3 {
  margin: 12px 0 0;
  font-family: var(--display);
  font-size: clamp(1.8rem, 3.1vw, 3.4rem);
  font-weight: 500;
  letter-spacing: -0.045em;
}

.timeline-main > p:last-child {
  max-width: 680px;
  margin: 16px 0 0;
  color: var(--slate);
  line-height: 1.7;
}

.timeline-place {
  color: var(--cyan);
  text-align: right;
}

.distinctions {
  margin-top: 110px;
}

.distinction-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(10, 28, 42, 0.5);
  box-shadow: var(--shadow-soft);
}

.distinction-grid article {
  min-height: 240px;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(145, 208, 202, 0.045), transparent);
}

.distinction-grid article:last-child {
  grid-column: 1 / -1;
}

.distinction-grid span {
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 0.95rem;
  letter-spacing: 0.09em;
}

.distinction-grid strong {
  display: block;
  margin-top: 48px;
  font-family: var(--display);
  font-size: clamp(2.2rem, 4.6vw, 5rem);
  font-weight: 500;
  letter-spacing: -0.06em;
}

.distinction-grid p {
  max-width: 660px;
  margin: 12px 0 0;
  color: var(--slate);
  line-height: 1.65;
}

.practice {
  position: relative;
  padding: clamp(110px, 13vw, 180px) 0 0;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(circle at 82% 9%, rgba(145, 208, 202, 0.1), transparent 30rem),
    linear-gradient(180deg, var(--navy-900), var(--navy-950));
}

.practice-heading h2 {
  max-width: 980px;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(3.1rem, 6vw, 7rem);
  font-weight: 500;
  letter-spacing: -0.065em;
  line-height: 0.94;
}

.practice-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  width: min(100% - 72px, 1500px);
  margin: 90px auto 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(10, 28, 42, 0.52);
  box-shadow: var(--shadow);
}

.practice-card {
  min-width: 0;
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(145, 208, 202, 0.035), transparent);
  transition: background 180ms ease;
}

.practice-card:hover {
  background: linear-gradient(180deg, rgba(145, 208, 202, 0.07), transparent);
}

.practice-card:last-child {
  border-right: 0;
}

.practice-card--featured {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  grid-column: 1 / -1;
  border-right: 0;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(115deg, rgba(145, 208, 202, 0.08), transparent 38%),
    linear-gradient(180deg, rgba(215, 199, 163, 0.045), transparent);
}

.practice-card--featured .card-topline {
  grid-column: 1 / -1;
}

.card-topline {
  display: flex;
  justify-content: space-between;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 20, 32, 0.28);
  color: var(--slate);
  font-family: var(--mono);
  font-size: 0.95rem;
  letter-spacing: 0.09em;
}

.market-visual,
.interface-visual,
.code-visual {
  position: relative;
  height: 360px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: var(--navy-950);
}

.market-visual {
  display: flex;
  align-items: flex-end;
  padding: 35px 20px 45px;
  background-image:
    radial-gradient(circle at 72% 18%, rgba(206, 219, 187, 0.12), transparent 12rem),
    linear-gradient(rgba(145, 208, 202, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(145, 208, 202, 0.07) 1px, transparent 1px);
  background-size: 100% 100%, 44px 44px, 44px 44px;
}

.market-visual svg {
  width: 100%;
  height: 72%;
  overflow: visible;
}

.chart-area {
  fill: url(#none);
  fill: rgba(36, 87, 255, 0.14);
}

.chart-line {
  fill: none;
  stroke: var(--cyan);
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
  filter: drop-shadow(0 0 8px rgba(145, 208, 202, 0.45));
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
}

.is-visible .chart-line {
  animation: draw-line 1.8s 250ms ease forwards;
}

@keyframes draw-line {
  to { stroke-dashoffset: 0; }
}

.chart-axis {
  position: absolute;
  right: 18px;
  bottom: 13px;
  left: 18px;
  display: flex;
  justify-content: space-between;
  color: var(--slate);
  font-family: var(--mono);
  font-size: 0.9rem;
}

.chart-tag {
  position: absolute;
  top: 23px;
  right: 19px;
  padding: 6px 8px;
  background: var(--sand);
  color: #081725;
  font-family: var(--mono);
  font-size: 0.95rem;
}

.research-visual {
  position: relative;
  min-height: 610px;
  padding: clamp(28px, 4vw, 58px);
  border-right: 1px solid var(--line);
  background-color: var(--navy-950);
  background-image:
    radial-gradient(circle at 82% 18%, rgba(206, 219, 187, 0.13), transparent 17rem),
    radial-gradient(circle at 19% 74%, rgba(145, 208, 202, 0.1), transparent 14rem),
    linear-gradient(rgba(145, 208, 202, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(145, 208, 202, 0.055) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 46px 46px, 46px 46px;
}

.research-visual::before {
  position: absolute;
  top: 58px;
  right: -145px;
  width: 430px;
  height: 430px;
  border: 1px solid rgba(206, 219, 187, 0.16);
  border-radius: 50%;
  content: "";
  opacity: 0.75;
  box-shadow:
    0 0 0 44px rgba(145, 208, 202, 0.035),
    0 0 0 88px rgba(215, 199, 163, 0.025);
}

.research-visual > * {
  position: relative;
  z-index: 1;
}

.research-window {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  padding: 18px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(7, 20, 32, 0.42);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  gap: 12px;
}

.research-window span,
.research-window small,
.comparison-row span,
.research-stats span,
.research-method span,
.research-notes span,
.research-caption {
  color: var(--slate);
  font-family: var(--mono);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
}

.research-window strong {
  color: var(--sand);
  font-family: var(--display);
  font-size: clamp(1.6rem, 2.3vw, 2.7rem);
  font-weight: 500;
  letter-spacing: -0.05em;
}

.research-window small {
  grid-column: 1 / -1;
  line-height: 1.6;
}

.research-comparison {
  display: grid;
  margin: clamp(54px, 7vw, 86px) 0;
  gap: 34px;
}

.comparison-row {
  display: grid;
  grid-template-columns: 150px minmax(80px, 1fr) 94px;
  align-items: center;
  gap: 16px;
}

.comparison-row strong {
  color: var(--ice);
  font-family: var(--mono);
  font-size: 1.08rem;
  font-weight: 500;
  text-align: right;
}

.comparison-row.is-selected strong,
.comparison-row.is-selected span {
  color: var(--sand);
}

.comparison-track {
  height: 14px;
  overflow: hidden;
  border: 1px solid rgba(221, 237, 232, 0.08);
  border-radius: 999px;
  background: rgba(147, 166, 179, 0.12);
}

.comparison-track i {
  display: block;
  width: var(--result);
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--cobalt), var(--cyan));
  transform: scaleX(0);
  transform-origin: left;
}

.comparison-row.is-selected .comparison-track i {
  background: linear-gradient(90deg, var(--cyan), var(--sand));
}

.is-visible .comparison-track i {
  animation: research-bar 900ms 300ms ease forwards;
}

.is-visible .comparison-row.is-selected .comparison-track i {
  animation-delay: 480ms;
}

@keyframes research-bar {
  to { transform: scaleX(1); }
}

.research-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.research-stats div {
  min-height: 126px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(7, 20, 32, 0.36);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.035);
}

.research-stats strong {
  display: block;
  margin-top: 18px;
  color: var(--ice);
  font-family: var(--display);
  font-size: clamp(1.45rem, 2.1vw, 2.4rem);
  font-weight: 500;
  letter-spacing: -0.05em;
}

.research-caption {
  margin: 18px 0 0;
  line-height: 1.7;
}

.interface-visual {
  margin: 35px;
  height: 290px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background:
    radial-gradient(circle at 85% 10%, rgba(206, 219, 187, 0.12), transparent 10rem),
    #0b1730;
  box-shadow: var(--shadow-soft);
  transition: transform 400ms ease;
}

.practice-card:hover .interface-visual {
  transform: translateY(-5px);
}

.interface-nav {
  display: flex;
  align-items: center;
  height: 36px;
  padding: 0 12px;
  border-bottom: 1px solid rgba(238, 243, 250, 0.12);
  gap: 6px;
}

.interface-nav i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #31415f;
}

.interface-nav span {
  margin-left: auto;
  color: #71819d;
  font-family: var(--mono);
  font-size: 0.9rem;
}

.interface-layout {
  display: grid;
  grid-template-columns: 28% 1fr;
  height: calc(100% - 36px);
}

.interface-list {
  padding: 18px 13px;
  border-right: 1px solid rgba(238, 243, 250, 0.1);
}

.interface-list span {
  display: block;
  height: 7px;
  margin-bottom: 18px;
  background: #233454;
}

.interface-list .is-active {
  width: 75%;
  background: var(--cyan);
}

.interface-main {
  display: flex;
  flex-direction: column;
  padding: 24px;
}

.interface-value {
  color: #eef3fa;
  font-family: var(--display);
  font-size: 2.7rem;
  letter-spacing: -0.05em;
}

.interface-bars {
  display: flex;
  flex: 1;
  align-items: flex-end;
  margin-top: 25px;
  gap: 8px;
}

.interface-bars i {
  flex: 1;
  height: var(--h);
  background: linear-gradient(to top, var(--cobalt), var(--cyan));
  transform: scaleY(0);
  transform-origin: bottom;
}

.is-visible .interface-bars i {
  animation: grow-bar 700ms ease forwards;
}

.is-visible .interface-bars i:nth-child(2) { animation-delay: 70ms; }
.is-visible .interface-bars i:nth-child(3) { animation-delay: 140ms; }
.is-visible .interface-bars i:nth-child(4) { animation-delay: 210ms; }
.is-visible .interface-bars i:nth-child(5) { animation-delay: 280ms; }
.is-visible .interface-bars i:nth-child(6) { animation-delay: 350ms; }

@keyframes grow-bar {
  to { transform: scaleY(1); }
}

.code-visual {
  display: grid;
  grid-template-columns: 42px 1fr;
  align-items: center;
  padding: 44px 20px;
  background:
    radial-gradient(circle at 86% 18%, rgba(215, 199, 163, 0.11), transparent 11rem),
    var(--navy-950);
}

.code-gutter {
  color: #40516f;
  font-family: var(--mono);
  font-size: 1rem;
  line-height: 2.2;
  text-align: right;
}

.code-visual pre {
  margin: 0 0 0 18px;
  color: var(--ice);
  font-family: var(--mono);
  font-size: clamp(0.92rem, 1vw, 1.05rem);
  line-height: 2.2;
}

.code-blue { color: var(--cyan); }
.code-lime { color: var(--lime); }

.code-cursor {
  position: absolute;
  right: 35px;
  bottom: 42px;
  width: 8px;
  height: 16px;
  background: var(--sand);
  animation: blink 1s steps(1) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.card-copy {
  min-height: 250px;
  padding: 30px;
  background: rgba(7, 20, 32, 0.08);
}

.card-copy h3 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(2rem, 3vw, 3.2rem);
  font-weight: 500;
  letter-spacing: -0.05em;
}

.card-copy p {
  max-width: 370px;
  margin: 22px 0 0;
  color: var(--slate);
  line-height: 1.7;
}

.research-copy {
  min-height: 610px;
  padding: clamp(32px, 4vw, 60px);
}

.research-copy .research-thesis {
  max-width: 590px;
  color: var(--ice);
  font-size: clamp(1.1rem, 1.5vw, 1.35rem);
  line-height: 1.55;
}

.research-method {
  display: grid;
  margin-top: 38px;
  border-top: 1px solid var(--line);
}

.research-method div {
  display: grid;
  grid-template-columns: 145px minmax(0, 1fr);
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  gap: 20px;
}

.research-method strong {
  color: var(--ice);
  font-size: 1.08rem;
  font-weight: 400;
  line-height: 1.55;
}

.research-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 34px;
  gap: 30px;
}

.research-notes p {
  max-width: none;
  margin-top: 12px;
  font-size: 1.04rem;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-top: 28px;
  padding: 9px 0 6px;
  border-bottom: 1px solid var(--cyan);
  color: var(--ice);
  font-family: var(--mono);
  font-size: 1rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0 28px;
}

.card-link span {
  color: var(--lime);
  transition: transform 200ms ease;
}

.card-link:hover span {
  transform: translate(3px, -3px);
}

.challenge {
  position: relative;
  padding: clamp(110px, 13vw, 180px) 0;
  overflow: hidden;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(circle at 18% 16%, rgba(47, 140, 255, 0.13), transparent 28rem),
    radial-gradient(circle at 86% 18%, rgba(121, 184, 255, 0.09), transparent 24rem),
    linear-gradient(180deg, #071420, #08111b 54%, var(--navy-950));
}

.challenge::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  opacity: 0.34;
  background-image:
    linear-gradient(rgba(121, 184, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(121, 184, 255, 0.08) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, transparent, black 18%, black 82%, transparent);
}

.challenge-heading,
.challenge-panel {
  position: relative;
  z-index: 1;
}

.challenge-heading h2 {
  max-width: 1020px;
  margin: 0;
  font-family: "Noto Sans SC", "Microsoft YaHei", var(--display);
  font-size: clamp(3.1rem, 6vw, 7rem);
  font-weight: 600;
  letter-spacing: -0.06em;
  line-height: 0.95;
}

.challenge-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(310px, 420px);
  align-items: stretch;
  width: min(100% - 72px, 1500px);
  margin: 88px auto 0;
  overflow: hidden;
  border: 1px solid rgba(121, 184, 255, 0.22);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 24% 24%, rgba(47, 140, 255, 0.12), transparent 24rem),
    rgba(8, 18, 30, 0.78);
  box-shadow: 0 30px 110px rgba(0, 7, 18, 0.45);
}

.challenge-copy {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 720px;
  padding: clamp(32px, 5vw, 68px);
  border-right: 1px solid rgba(121, 184, 255, 0.16);
}

.challenge-lede {
  max-width: 900px;
  margin: 0;
  color: var(--ice);
  font-size: clamp(1.25rem, 2vw, 2rem);
  font-weight: 500;
  line-height: 1.65;
}

.challenge-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: clamp(34px, 5vw, 58px) 0;
}

.challenge-metrics div {
  min-height: 160px;
  padding: 20px;
  border: 1px solid rgba(121, 184, 255, 0.2);
  border-radius: 22px;
  background: rgba(7, 20, 32, 0.5);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.045);
}

.challenge-metrics span,
.challenge-rules span,
.challenge-video-top {
  color: #9fb6cf;
  font-family: var(--mono);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.challenge-metrics strong {
  display: block;
  margin-top: 40px;
  color: #79b8ff;
  font-family: "Noto Sans SC", "Microsoft YaHei", var(--display);
  font-size: clamp(2.2rem, 4.4vw, 4.8rem);
  font-weight: 600;
  letter-spacing: -0.06em;
  line-height: 0.9;
}

.challenge-rules {
  display: grid;
  gap: 14px;
}

.challenge-rules article {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  align-items: center;
  min-height: 82px;
  padding: 0 20px;
  border: 1px solid rgba(121, 184, 255, 0.16);
  border-radius: 20px;
  background: rgba(13, 26, 41, 0.62);
}

.challenge-rules p {
  margin: 0;
  color: var(--slate);
  font-size: 1.08rem;
  line-height: 1.7;
}

.challenge-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0 28px;
  margin-top: 38px;
}

.challenge-video-stack {
  display: grid;
  align-content: start;
  background: rgba(4, 10, 17, 0.46);
}

.challenge-video-card {
  display: grid;
  grid-template-rows: auto 1fr;
  padding: 22px;
  background:
    linear-gradient(180deg, rgba(47, 140, 255, 0.1), rgba(7, 20, 32, 0.2)),
    rgba(4, 10, 17, 0.56);
}

.challenge-video-card + .challenge-video-card {
  border-top: 1px solid rgba(121, 184, 255, 0.16);
}

.challenge-video-card--xuanheng {
  background:
    radial-gradient(circle at 18% 14%, rgba(103, 170, 146, 0.16), transparent 16rem),
    linear-gradient(180deg, rgba(47, 140, 255, 0.08), rgba(7, 20, 32, 0.2)),
    rgba(4, 10, 17, 0.62);
}

.challenge-video-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 0 2px 16px;
}

.challenge-video-card video {
  display: block;
  width: 100%;
  min-height: 0;
  aspect-ratio: 9 / 16;
  border: 1px solid rgba(121, 184, 255, 0.22);
  border-radius: 28px;
  background: #070a0f;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
}

.contact {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  min-height: 760px;
  padding: clamp(100px, 12vw, 180px) max(36px, calc((100vw - 1500px) / 2));
  overflow: hidden;
  background:
    radial-gradient(circle at 82% 10%, rgba(206, 219, 187, 0.2), transparent 24rem),
    linear-gradient(135deg, #244955, #102637 56%, #071420);
  color: #fff;
}

.contact::before {
  position: absolute;
  top: -45%;
  right: -10%;
  width: 850px;
  height: 850px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  content: "";
  box-shadow:
    0 0 0 54px rgba(255, 255, 255, 0.025),
    0 0 0 108px rgba(206, 219, 187, 0.02);
}

.contact-noise {
  position: absolute;
  inset: 0;
  opacity: 0.2;
  background-image: radial-gradient(circle at 75% 25%, rgba(196, 212, 174, 0.65) 0 1px, transparent 2px);
  background-size: 24px 24px;
  mask-image: radial-gradient(circle at 75% 25%, black, transparent 45%);
}

.contact-copy,
.contact-meta {
  position: relative;
  z-index: 2;
}

.contact .kicker {
  color: var(--sand);
}

.contact h2 {
  max-width: 1050px;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(4rem, 8vw, 9.5rem);
  font-weight: 500;
  letter-spacing: -0.075em;
  line-height: 0.87;
}

.contact-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100%, 620px);
  margin-top: 70px;
  padding: 22px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.6);
  font-family: var(--display);
  font-size: clamp(1.3rem, 2.2vw, 2rem);
}

.contact-link i {
  color: var(--lime);
  font-family: var(--mono);
  font-style: normal;
  transition: transform 200ms ease;
}

.contact-link:hover i {
  transform: translate(5px, -5px);
}

.social-grid {
  display: flex;
  align-items: center;
  gap: 12px;
  width: fit-content;
  max-width: 100%;
  margin-top: 24px;
  padding: 8px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(5, 16, 26, 0.28);
  box-shadow: 0 18px 55px rgba(0, 0, 0, 0.14);
  backdrop-filter: blur(18px);
}

.social-link {
  position: relative;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  color: #fff;
  background: rgba(255, 255, 255, 0.07);
  isolation: isolate;
  transition: background 200ms ease, transform 200ms ease, border-color 200ms ease;
}

.social-link::after {
  position: absolute;
  inset: -5px;
  z-index: -1;
  border-radius: inherit;
  background: radial-gradient(circle, rgba(145, 208, 202, 0.22), transparent 68%);
  opacity: 0;
  content: "";
  transition: opacity 200ms ease;
}

.social-link--active:hover {
  background: rgba(145, 208, 202, 0.11);
  border-color: rgba(145, 208, 202, 0.5);
  transform: translateY(-2px);
}

.social-link--active:hover::after {
  opacity: 1;
}

.social-link--pending {
  color: rgba(255, 255, 255, 0.66);
}

.social-link--pending:hover {
  background: rgba(255, 255, 255, 0.1);
}

.social-icon {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  color: var(--lime);
}

.social-icon svg {
  display: block;
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.social-icon--linkedin {
  color: #91d0ca;
}

.social-icon--x {
  color: #fff;
}

.social-icon--tiktok {
  color: #b8eff0;
  text-shadow: 1px 0 rgba(255, 72, 111, 0.65);
}

.social-icon--instagram {
  color: #f2c7a7;
}

.social-icon--xiaohongshu {
  color: #ffd2d2;
}

.contact-meta {
  display: grid;
  gap: 12px;
  padding-bottom: 6px;
}

.contact-meta p {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-align: right;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: min(100% - 72px, 1500px);
  margin: 0 auto;
  padding: 30px 0;
  gap: 30px;
}

.site-footer > div:first-child {
  display: flex;
  align-items: center;
  gap: 12px;
}

.site-footer p {
  margin: 0;
  color: var(--slate);
  font-family: var(--mono);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
}

.footer-note {
  text-align: center;
}

.footer-links {
  display: flex;
  justify-self: end;
  gap: 24px;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 750ms ease, transform 750ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1250px) {
  .availability {
    display: none;
  }

  .nav-links {
    gap: 18px;
  }

  .nav-links a {
    font-size: 0.92rem;
  }
}

@media (max-width: 980px) {
  .theme-label {
    display: none;
  }
}

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: 45px 1fr;
  }

  .signal-stage {
    grid-column: 2;
    width: min(100%, 720px);
    height: 520px;
    margin-top: 20px;
  }

  .hero-contact {
    position: static;
    grid-column: 2;
    justify-self: start;
  }

  .working-code {
    grid-template-columns: 1fr 1fr;
  }

  .working-code > *:nth-child(2) {
    border-right: 0;
  }

  .working-code > *:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .timeline-entry {
    grid-template-columns: 150px minmax(0, 1fr);
  }

  .timeline-place {
    grid-column: 2;
    text-align: left;
  }

  .practice-list {
    grid-template-columns: 1fr;
  }

  .challenge-panel {
    grid-template-columns: 1fr;
  }

  .challenge-copy {
    min-height: 0;
    border-right: 0;
    border-bottom: 1px solid rgba(121, 184, 255, 0.16);
  }

  .challenge-video-stack {
    width: min(100%, 520px);
    justify-self: center;
  }

  .practice-card {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .practice-card:last-child {
    border-bottom: 0;
  }

  .card-topline {
    grid-column: 1 / -1;
  }

  .market-visual,
  .research-visual,
  .interface-visual,
  .code-visual {
    border-right: 1px solid var(--line);
    border-bottom: 0;
  }

  .interface-visual {
    margin: 30px;
  }
}

@media (max-width: 760px) {
  .site-header,
  .hero,
  .section-wrap,
  .practice-list,
  .challenge-panel,
  .site-footer {
    width: min(100% - 36px, 1500px);
  }

  .site-header {
    grid-template-columns: 1fr auto;
    padding: 12px 14px;
    border-radius: 24px;
  }

  .nav-links,
  .availability,
  .theme-label {
    display: none;
  }

  .header-meta {
    gap: 15px;
  }

  .language-switch {
    font-size: 1rem;
  }

  .hero {
    grid-template-columns: 1fr;
    padding: 126px 0 65px;
  }

  .hero::before {
    display: none;
  }

  .hero-index {
    display: none;
  }

  .hero h1 {
    font-size: clamp(3.7rem, 18vw, 5.5rem);
    line-height: 0.86;
  }

  .headline-shift {
    transform: translateX(0);
  }

  .hero-summary {
    grid-template-columns: 1fr;
    margin-top: 38px;
  }

  .primary-link {
    justify-self: start;
  }

  .signal-stage,
  .hero-contact {
    grid-column: 1;
  }

  .signal-stage {
    min-height: 390px;
    height: 54vh;
    border-radius: 24px;
  }

  .signal-grid,
  .signal-crosshair {
    inset: 56px 14px 58px;
  }

  .section-wrap {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .timeline {
    width: min(100% - 36px, 1500px);
    margin-top: 60px;
  }

  .timeline-entry {
    grid-template-columns: 1fr;
    min-height: 0;
    padding: 28px 22px;
    gap: 12px;
  }

  .timeline-place {
    grid-column: 1;
    margin-top: 8px;
  }

  .distinctions {
    margin-top: 75px;
  }

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

  .distinction-grid article,
  .distinction-grid article:last-child {
    grid-column: 1;
    min-height: 200px;
  }

  .section-rail {
    padding: 0 0 20px;
    border-right: 0;
    border-bottom: 0;
  }

  .section-rail::before {
    top: auto;
    right: auto;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(to right, var(--line-strong), transparent);
  }

  .section-rail::after {
    top: auto;
    right: auto;
    bottom: -4px;
    left: 0;
  }

  .profile-detail {
    grid-template-columns: 1fr;
    margin-top: 45px;
  }

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

  .current-card {
    min-height: 310px;
  }

  .current-card + .current-card {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .working-code {
    grid-template-columns: 1fr;
    margin-top: 65px;
  }

  .working-code > *,
  .working-code > *:nth-child(2) {
    min-height: 120px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .working-code > *:last-child {
    border-bottom: 0;
  }

  .practice-list {
    margin-top: 60px;
  }

  .challenge {
    padding: 90px 0;
  }

  .challenge-heading h2 {
    font-size: clamp(3rem, 13vw, 5.6rem);
    line-height: 1;
  }

  .challenge-panel {
    margin-top: 58px;
    border-radius: 24px;
  }

  .challenge-copy {
    padding: 28px 22px;
  }

  .challenge-lede {
    font-size: 1.16rem;
  }

  .challenge-metrics {
    grid-template-columns: 1fr;
    margin: 34px 0;
  }

  .challenge-metrics div {
    min-height: 128px;
  }

  .challenge-metrics strong {
    margin-top: 24px;
  }

  .challenge-rules article {
    grid-template-columns: 42px minmax(0, 1fr);
    padding: 16px;
  }

  .challenge-actions {
    margin-top: 28px;
  }

  .challenge-video-card {
    padding: 16px;
  }

  .challenge-video-card video {
    border-radius: 22px;
  }

  .practice-card {
    display: block;
  }

  .market-visual,
  .research-visual,
  .interface-visual,
  .code-visual {
    height: 300px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .interface-visual {
    height: 250px;
    margin: 25px;
  }

  .research-visual {
    min-height: 0;
    height: auto;
    padding: 30px 22px;
  }

  .research-window {
    grid-template-columns: 1fr;
  }

  .comparison-row {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px 14px;
  }

  .comparison-track {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .research-copy {
    min-height: 0;
    padding: 34px 24px;
  }

  .research-method div,
  .research-notes {
    grid-template-columns: 1fr;
  }

  .research-method div {
    gap: 9px;
  }

  .card-copy {
    min-height: 0;
  }

  .contact {
    grid-template-columns: 1fr;
    min-height: 680px;
    padding-right: 18px;
    padding-left: 18px;
    gap: 65px;
  }

  .contact h2 {
    font-size: clamp(3.7rem, 16vw, 6rem);
  }

  .social-grid {
    flex-wrap: wrap;
    width: fit-content;
    border-radius: 999px;
  }

  .social-link {
    width: 44px;
    height: 44px;
  }

  .contact-meta p {
    text-align: left;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }

  .footer-note {
    display: none;
  }

  .footer-links {
    justify-self: start;
    flex-wrap: wrap;
  }
}

@media (max-width: 420px) {
  .hero h1 {
    font-size: 16.5vw;
  }

  .research-stats {
    grid-template-columns: 1fr;
  }

  .signal-readout {
    gap: 12px;
  }

  .signal-caption {
    display: none;
  }

  .footer-links {
    gap: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .chart-line { stroke-dashoffset: 0; }
  .interface-bars i { transform: scaleY(1); }
}