@charset "UTF-8";

:root {
  --bg: #0c1713;
  --bg-deep: #08110e;
  --surface: #12221b;
  --surface-soft: #172a21;
  --ink: #edf2e7;
  --muted: #a2b0a5;
  --dim: #7b8c82;
  --accent: #c3e878;
  --accent-ink: #182411;
  --line: #2a3a31;
  --line-soft: rgba(195, 232, 120, 0.16);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --font-tech: "DIN Alternate", "Bahnschrift", "Aptos", sans-serif;
  --page: min(1400px, calc(100vw - 96px));
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font-sans); -webkit-font-smoothing: antialiased; }
body::before { content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 20; opacity: 0.18; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.08'/%3E%3C/svg%3E"); }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
a { color: inherit; text-decoration: none; }
button { color: inherit; }
svg { display: block; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; }
[hidden] { display: none !important; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 100; padding: 12px 18px; background: var(--accent); color: var(--accent-ink); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
.site-shell { overflow: clip; }
.site-header { width: var(--page); height: 88px; margin: 0 auto; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; border-bottom: 1px solid var(--line); position: relative; z-index: 30; }
.brand { display: inline-flex; align-items: center; gap: 11px; width: max-content; }
.brand-mark { width: 32px; height: 32px; fill: none; stroke: var(--accent); stroke-width: 1.6; }
.brand-name { font-family: var(--font-tech); font-size: 19px; font-weight: 700; letter-spacing: 0.08em; }
.brand-name span { color: var(--accent); }
.desktop-nav { display: flex; gap: 34px; font-size: 13px; color: var(--muted); }
.desktop-nav a { padding: 12px 0; transition: color 180ms ease; }
.desktop-nav a:hover { color: var(--accent); }
.button { min-height: 46px; border: 1px solid var(--line); background: transparent; padding: 0 20px; display: inline-flex; align-items: center; justify-content: center; gap: 26px; cursor: pointer; font-size: 14px; transition: transform 180ms var(--ease), background 180ms ease, color 180ms ease; }
.button:hover { transform: translateY(-2px); }
.button:active { transform: scale(0.98); }
.button-small { min-height: 40px; padding: 0 16px; gap: 20px; }
.header-contact { justify-self: end; border-color: var(--line-soft); }
.header-contact:hover { background: var(--accent); color: var(--accent-ink); }
.button-arrow { font-size: 17px; }
.menu-toggle, .mobile-nav { display: none; }

.hero { width: var(--page); min-height: min(800px, calc(100dvh - 88px)); margin: 0 auto; display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(480px, 1.1fr); gap: clamp(42px, 6vw, 100px); align-items: center; position: relative; padding: 70px 0 86px; }
.hero::before { content: ""; position: absolute; width: 55%; height: 100%; right: -10%; top: 0; pointer-events: none; background-image: linear-gradient(var(--line-soft) 1px, transparent 1px), linear-gradient(90deg, var(--line-soft) 1px, transparent 1px); background-size: 56px 56px; mask-image: linear-gradient(to right, transparent, #000 38%, transparent 96%); opacity: 0.45; }
.hero-copy { position: relative; z-index: 1; padding-bottom: 12px; }
.eyebrow, .section-no { font-family: var(--font-tech); font-size: 11px; font-weight: 600; letter-spacing: 0.18em; color: var(--accent); }
.eyebrow { display: flex; align-items: center; gap: 10px; margin-bottom: 32px; }
.status-dot { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; box-shadow: 0 0 0 4px rgba(195, 232, 120, 0.08); }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 28px; font-size: clamp(44px, 5.1vw, 76px); line-height: 1.16; letter-spacing: -0.065em; font-weight: 650; }
.accent-underline { color: var(--accent); position: relative; white-space: nowrap; }
.accent-underline::after { content: ""; position: absolute; left: 3px; right: 0; height: 2px; bottom: -5px; background: var(--accent); transform-origin: left; animation: line-in 900ms 350ms var(--ease) both; }
.hero-intro { max-width: 470px; color: var(--muted); font-size: 16px; line-height: 1.9; margin-bottom: 36px; }
.hero-actions { display: flex; align-items: center; gap: 30px; }
.button-primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); min-height: 52px; padding: 0 22px; font-weight: 600; }
.button-primary:hover { background: #d2ee99; }
.text-link { border: 0; background: none; cursor: pointer; display: inline-flex; align-items: center; gap: 10px; padding: 12px 0; font-family: var(--font-tech); font-size: 14px; letter-spacing: 0.05em; }
.copy-icon { width: 13px; height: 14px; border: 1px solid var(--dim); position: relative; }
.copy-icon::before { content: ""; position: absolute; width: 9px; height: 10px; border: 1px solid var(--dim); left: -5px; top: -5px; background: var(--bg); }
.hero-footnote { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 52px; color: var(--dim); font-size: 11px; }
.hero-footnote span + span::before { content: "/"; margin-right: 20px; color: var(--line); }
.hero-index { position: absolute; bottom: 24px; left: 0; font-family: var(--font-tech); font-size: 10px; letter-spacing: 0.2em; color: var(--dim); }

.terminal-wrap { position: relative; z-index: 1; padding: 42px 0 0 28px; }
.terminal-coordinate { position: absolute; left: 0; top: 0; font-family: var(--font-tech); font-size: 9px; line-height: 1.6; letter-spacing: 0.16em; color: var(--dim); }
.terminal { background: #101e18; border: 1px solid #35463b; box-shadow: 18px 18px 0 rgba(5, 13, 10, 0.45); transform: rotate(1.2deg); transition: transform 500ms var(--ease); }
.terminal-wrap:hover .terminal { transform: rotate(0deg); }
.terminal-topbar { height: 58px; padding: 0 18px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.terminal-title { display: flex; align-items: center; gap: 9px; font-size: 12px; }
.terminal-signal { width: 7px; height: 7px; background: var(--accent); border-radius: 50%; }
.terminal-live { color: var(--dim); font-family: var(--font-tech); font-size: 9px; letter-spacing: 0.12em; }
.terminal-tabs { display: grid; grid-template-columns: repeat(4, 1fr); padding: 0 12px; border-bottom: 1px solid var(--line); }
.terminal-tabs button { min-height: 48px; padding: 0 5px; background: none; border: 0; border-bottom: 2px solid transparent; cursor: pointer; color: var(--dim); font-size: 11px; transition: color 180ms ease, border-color 180ms ease; }
.terminal-tabs button[aria-selected="true"] { color: var(--accent); border-color: var(--accent); }
.terminal-tabs button:hover { color: var(--ink); }
.chat-screen { min-height: 356px; padding: 24px 20px 22px; background-image: linear-gradient(rgba(195, 232, 120, 0.025) 1px, transparent 1px), linear-gradient(90deg, rgba(195, 232, 120, 0.025) 1px, transparent 1px); background-size: 24px 24px; }
.chat-day { text-align: center; font-size: 9px; color: var(--dim); margin-bottom: 25px; }
.chat-day span { margin-left: 6px; }
.message { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 22px; }
.avatar { flex: 0 0 30px; height: 30px; display: grid; place-items: center; font-size: 11px; font-weight: 600; }
.avatar-user { background: #293a31; color: var(--muted); }
.avatar-bot { background: var(--accent); color: var(--accent-ink); font-family: var(--font-tech); }
.message-name { font-size: 9px; color: var(--dim); margin: 0 0 7px 2px; }
.message-name span { font-family: var(--font-tech); font-size: 7px; border: 1px solid var(--line); padding: 1px 3px; margin-left: 4px; }
.bubble { width: max-content; max-width: 100%; padding: 10px 13px; background: #25362d; color: #d8e1d8; font-size: 12px; line-height: 1.6; }
.bot-bubble { min-width: min(310px, 100%); display: flex; flex-direction: column; background: #1b2c23; border-left: 2px solid var(--accent); padding: 15px 17px; }
.bot-bubble strong { font-size: 11px; font-weight: 500; color: var(--muted); }
.asset-total { font-family: var(--font-tech); color: var(--accent); font-size: 32px; font-weight: 650; line-height: 1.4; letter-spacing: -0.03em; }
.asset-total small { font-family: var(--font-sans); font-size: 10px; font-weight: 400; }
.asset-detail { font-size: 11px; color: #d6e1d6; }
.message-meta { display: block; border-top: 1px solid var(--line); padding-top: 8px; margin-top: 10px; color: var(--dim); font-size: 9px; }
.demo-line { display: flex; justify-content: space-between; gap: 20px; padding: 3px 0; font-size: 11px; color: #d6e1d6; }
.demo-line span:last-child { color: var(--accent); }
.demo-source { color: var(--muted); font-size: 10px; margin-top: 7px; text-decoration: underline; text-underline-offset: 3px; }
.chat-screen.is-changing .message-bot { animation: response-in 350ms var(--ease); }
.terminal-statusbar { min-height: 44px; display: flex; align-items: center; justify-content: space-between; gap: 15px; border-top: 1px solid var(--line); padding: 10px 16px; color: var(--dim); font-size: 9px; }
.terminal-statusbar > span:first-child { color: var(--muted); white-space: nowrap; }
.terminal-statusbar i { display: inline-block; width: 5px; height: 5px; margin-right: 4px; background: var(--accent); border-radius: 50%; }
.terminal-note { margin: 24px 0 0 30px; color: var(--dim); font-size: 10px; letter-spacing: 0.04em; }
.terminal-note span { font-family: var(--font-tech); color: var(--accent); margin-right: 12px; }

.ticker { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); overflow: hidden; }
.ticker-track { width: var(--page); min-height: 76px; margin: auto; display: flex; justify-content: space-between; align-items: center; gap: 22px; color: var(--muted); font-size: 12px; }
.ticker-track i { width: 4px; height: 4px; background: var(--accent); transform: rotate(45deg); opacity: 0.7; }
.section { width: var(--page); margin: 0 auto; padding: clamp(100px, 11vw, 160px) 0; }
.section-heading { margin-bottom: clamp(56px, 7vw, 88px); }
.split-heading { display: grid; grid-template-columns: 1.3fr 0.7fr; gap: 80px; align-items: end; }
.section-no { display: block; margin-bottom: 24px; }
h2 { font-size: clamp(36px, 4vw, 58px); line-height: 1.25; letter-spacing: -0.055em; font-weight: 600; margin-bottom: 0; }
.split-heading > p { max-width: 440px; margin: 0 0 4px; color: var(--muted); font-size: 14px; line-height: 2; }
.world-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.world-item { min-height: 330px; padding: 30px 32px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); display: flex; flex-direction: column; justify-content: space-between; position: relative; transition: background 250ms ease; }
.world-item:hover { background: var(--surface); }
.world-item-featured { background: var(--accent); color: var(--accent-ink); }
.world-item-featured:hover { background: #cde993; }
.world-item-top { display: flex; justify-content: space-between; align-items: flex-start; }
.world-index { font-family: var(--font-tech); font-size: 12px; color: var(--dim); }
.world-item-featured .world-index { color: #4d6033; }
.world-item svg { width: 44px; height: 44px; fill: none; stroke: var(--accent); stroke-width: 1.25; stroke-linecap: square; stroke-linejoin: miter; }
.world-item-featured svg { stroke: var(--accent-ink); }
.world-item h3 { margin-bottom: 12px; font-size: 24px; font-weight: 550; letter-spacing: -0.04em; }
.world-item p { max-width: 410px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.85; }
.world-item-featured p { color: #40512b; }
.world-tag { position: absolute; right: 30px; bottom: 34px; font-family: var(--font-tech); font-size: 9px; letter-spacing: 0.14em; color: var(--dim); }
.world-item-featured .world-tag { color: #4d6033; }

.strength-section { padding-top: 40px; }
.strength-list { border-top: 1px solid var(--line); }
.strength-row { display: grid; grid-template-columns: 70px 0.8fr 1.35fr 150px; gap: 32px; align-items: center; min-height: 150px; border-bottom: 1px solid var(--line); }
.strength-no { font-family: var(--font-tech); font-size: 11px; color: var(--accent); }
.strength-row h3 { margin: 0; font-size: 21px; font-weight: 550; letter-spacing: -0.025em; }
.strength-row p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.9; }
.strength-label { text-align: right; font-family: var(--font-tech); font-size: 9px; letter-spacing: 0.12em; color: var(--dim); }
.bridge-section { padding-top: 40px; display: grid; grid-template-columns: 0.8fr 1.2fr; gap: clamp(60px, 9vw, 140px); align-items: center; }
.bridge-intro h2 { margin-bottom: 30px; }
.bridge-intro p { color: var(--muted); font-size: 14px; line-height: 2; margin: 0; }
.bridge-diagram { border: 1px solid var(--line); padding: 36px; background: var(--surface); }
.bridge-node { display: grid; grid-template-columns: 45px 1fr; gap: 7px 16px; align-items: center; }
.bridge-node > span { grid-row: 1 / 3; width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid var(--accent); color: var(--accent); font-family: var(--font-tech); font-size: 11px; }
.bridge-node strong { font-size: 17px; font-weight: 550; }
.bridge-node small { color: var(--dim); font-size: 11px; }
.bridge-link { display: flex; align-items: center; gap: 10px; height: 70px; margin-left: 20px; }
.bridge-link span { width: 1px; height: 22px; background: var(--line); }
.bridge-link b { font-family: var(--font-tech); font-size: 8px; letter-spacing: 0.18em; color: var(--accent); font-weight: 400; transform: rotate(90deg); }

.updates-section { padding-top: 60px; }
.release-list { border-top: 1px solid var(--line); }
.release-item { border-bottom: 1px solid var(--line); }
.release-summary { width: 100%; min-height: 104px; padding: 22px 0; display: grid; grid-template-columns: 110px 100px 1fr 110px 26px; gap: 20px; align-items: center; text-align: left; background: none; border: 0; cursor: pointer; }
.release-summary:hover .release-title { color: var(--accent); }
.release-type { color: var(--dim); font-size: 11px; }
.release-version { font-family: var(--font-tech); font-size: 20px; color: var(--accent); letter-spacing: -0.03em; }
.release-title { font-size: 16px; transition: color 180ms ease; }
.release-date, .release-summary time { color: var(--dim); font-family: var(--font-tech); font-size: 10px; text-align: right; }
.release-toggle { width: 20px; height: 20px; position: relative; justify-self: end; }
.release-toggle::before, .release-toggle::after { content: ""; position: absolute; width: 14px; height: 1px; top: 10px; left: 3px; background: var(--muted); transition: transform 200ms ease; }
.release-toggle::after { transform: rotate(90deg); }
.release-summary[aria-expanded="true"] .release-toggle::after { transform: rotate(0deg); }
.release-detail { display: grid; grid-template-columns: 230px 1fr; gap: 20px; padding: 0 46px 32px 0; }
.release-status { width: max-content; height: max-content; padding: 5px 8px; border: 1px solid var(--line-soft); color: var(--accent); font-size: 10px; }
.release-status-testing { color: var(--muted); border-color: var(--line); }
.release-detail ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 12px; line-height: 1.9; }
.release-detail li + li { margin-top: 5px; }

.guide-section { padding-top: 50px; }
.guide-steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }
.guide-steps li { min-height: 230px; padding: 28px 28px 20px 0; position: relative; }
.guide-steps li:not(:last-child) { border-right: 1px solid var(--line); margin-right: 28px; }
.guide-steps li::before { content: ""; position: absolute; width: 7px; height: 7px; background: var(--accent); top: -4px; left: 0; }
.guide-steps span { color: var(--dim); font-family: var(--font-tech); font-size: 9px; letter-spacing: 0.14em; }
.guide-steps h3 { margin: 48px 0 14px; font-size: 20px; font-weight: 550; }
.guide-steps p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.8; }
.faq-section { width: var(--page); margin: 0 auto; padding: 30px 0 140px; display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 100px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { min-height: 82px; display: flex; justify-content: space-between; align-items: center; gap: 20px; cursor: pointer; list-style: none; font-size: 14px; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { flex: 0 0 16px; height: 16px; position: relative; }
.faq-list summary span::before, .faq-list summary span::after { content: ""; position: absolute; width: 14px; height: 1px; background: var(--accent); top: 8px; left: 1px; }
.faq-list summary span::after { transform: rotate(90deg); transition: transform 180ms ease; }
.faq-list details[open] summary span::after { transform: rotate(0); }
.faq-list details p { padding: 0 40px 24px 0; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.9; }

.contact-section { width: var(--page); min-height: 530px; margin: 0 auto 50px; padding: 70px; background: var(--accent); color: var(--accent-ink); position: relative; overflow: hidden; display: grid; place-items: center; text-align: center; }
.contact-content { position: relative; z-index: 2; }
.contact-section .section-no { color: #526738; margin-bottom: 22px; }
.contact-section h2 { font-size: clamp(38px, 4.5vw, 64px); }
.contact-section p { margin: 24px 0 36px; color: #40532b; font-size: 13px; line-height: 1.9; }
.qq-button { width: min(460px, 100%); min-height: 90px; margin: 0 auto; padding: 0 24px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 20px; border: 1px solid var(--accent-ink); background: var(--accent-ink); color: var(--ink); cursor: pointer; transition: transform 200ms var(--ease); }
.qq-button:hover { transform: translateY(-3px); }
.qq-button:active { transform: scale(0.98); }
.qq-label { font-size: 11px; color: var(--muted); }
.qq-button strong { font-family: var(--font-tech); font-size: 30px; letter-spacing: 0.06em; }
.qq-action { font-size: 10px; color: var(--accent); }
.qq-action i { font-style: normal; margin-left: 5px; }
.contact-qq { margin-top: 20px; padding: 10px 0; border: 0; border-bottom: 1px solid rgba(24, 36, 17, 0.45); background: transparent; color: var(--accent-ink); cursor: pointer; font-size: 12px; }
.contact-qq span { margin-left: 14px; }
.contact-qq:hover { border-bottom-color: var(--accent-ink); }
.contact-orbit { position: absolute; width: 760px; height: 760px; left: 50%; top: 50%; transform: translate(-50%, -50%); opacity: 0.16; }
.contact-orbit span { position: absolute; inset: 0; border: 1px solid var(--accent-ink); border-radius: 50%; }
.contact-orbit span:nth-child(2) { inset: 100px; }
.contact-orbit span:nth-child(3) { inset: 200px; }
.site-footer { width: var(--page); min-height: 150px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr 1fr; align-items: center; gap: 30px; border-top: 1px solid var(--line); }
.site-footer > p { margin: 0; text-align: center; color: var(--dim); font-size: 11px; }
.site-footer > div { display: flex; flex-direction: column; align-items: flex-end; gap: 10px; color: var(--dim); font-size: 10px; }
.site-footer > div a { color: var(--muted); }
.toast { position: fixed; z-index: 100; left: 50%; bottom: 28px; transform: translateX(-50%); max-width: calc(100vw - 32px); padding: 13px 20px; background: var(--ink); color: var(--bg); border-left: 3px solid var(--accent); font-size: 13px; box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25); animation: toast-in 250ms var(--ease); }

@keyframes line-in { from { transform: scaleX(0); } to { transform: scaleX(1); } }
@keyframes response-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes toast-in { from { opacity: 0; transform: translate(-50%, 8px); } to { opacity: 1; transform: translate(-50%, 0); } }

@media (min-width: 1500px) {
  .hero { grid-template-columns: 0.85fr 1.15fr; }
  .terminal { max-width: 680px; margin-left: auto; }
}

@media (max-width: 1100px) {
  :root { --page: calc(100vw - 56px); }
  .desktop-nav { gap: 20px; }
  .hero { grid-template-columns: minmax(0, 0.85fr) minmax(430px, 1.15fr); gap: 34px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 12px; }
  .hero-footnote { margin-top: 32px; }
  .terminal-wrap { padding-left: 0; }
  .terminal-coordinate { display: none; }
  .chat-screen { min-height: 340px; }
  .strength-row { grid-template-columns: 45px 0.8fr 1.3fr; }
  .strength-label { display: none; }
  .release-summary { grid-template-columns: 90px 80px 1fr 90px 24px; gap: 12px; }
  .release-detail { grid-template-columns: 182px 1fr; }
  .faq-section { gap: 60px; }
}

@media (max-width: 820px) {
  :root { --page: calc(100vw - 40px); }
  .site-header { height: 74px; grid-template-columns: 1fr auto; }
  .desktop-nav, .header-contact { display: none; }
  .menu-toggle { display: flex; width: 44px; height: 44px; padding: 0; border: 0; background: none; flex-direction: column; align-items: flex-end; justify-content: center; gap: 7px; cursor: pointer; }
  .menu-toggle span { display: block; width: 24px; height: 1px; background: var(--ink); transition: transform 200ms ease; }
  .menu-toggle span:last-child { width: 17px; }
  .menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] span:last-child { width: 24px; transform: translateY(-4px) rotate(-45deg); }
  .mobile-nav { display: flex; position: absolute; left: 0; right: 0; top: 73px; padding: 20px; background: #101e18; border: 1px solid var(--line); flex-direction: column; box-shadow: 0 20px 30px rgba(0,0,0,0.25); }
  .mobile-nav a, .mobile-nav button { min-height: 50px; display: flex; align-items: center; padding: 0 8px; border: 0; border-bottom: 1px solid var(--line); background: none; color: var(--muted); font-size: 14px; text-align: left; }
  .mobile-nav button { color: var(--accent); cursor: pointer; border-bottom: 0; }
  .hero { min-height: auto; grid-template-columns: 1fr; padding: 70px 0 90px; gap: 70px; }
  .hero::before { width: 100%; right: 0; }
  .hero-copy { max-width: 650px; }
  h1 { font-size: clamp(48px, 9vw, 68px); }
  .hero-intro { max-width: 560px; }
  .hero-actions { flex-direction: row; align-items: center; gap: 28px; }
  .terminal-wrap { width: min(620px, 100%); margin: 0 auto; }
  .terminal { transform: none; }
  .terminal-wrap:hover .terminal { transform: none; }
  .hero-index { bottom: 30px; }
  .ticker-track { flex-wrap: wrap; justify-content: center; padding: 24px 0; gap: 16px 22px; }
  .split-heading { grid-template-columns: 1fr; gap: 28px; }
  .split-heading > p { max-width: 600px; }
  .world-item { min-height: 300px; }
  .world-tag { display: none; }
  .strength-section, .bridge-section, .updates-section, .guide-section { padding-top: 20px; }
  .strength-row { grid-template-columns: 36px 1fr; gap: 16px; padding: 28px 0; }
  .strength-row p { grid-column: 2; }
  .bridge-section { grid-template-columns: 1fr; gap: 50px; }
  .bridge-intro { max-width: 620px; }
  .release-summary { grid-template-columns: 80px 1fr 24px; gap: 10px 14px; min-height: 120px; }
  .release-version { grid-column: 2; grid-row: 1; }
  .release-title { grid-column: 1 / 3; grid-row: 2; }
  .release-date, .release-summary time { grid-column: 1 / 3; grid-row: 3; text-align: left; }
  .release-toggle { grid-column: 3; grid-row: 1 / 4; }
  .release-detail { grid-template-columns: 1fr; padding-right: 40px; }
  .guide-steps { grid-template-columns: repeat(2, 1fr); }
  .guide-steps li:nth-child(2) { border-right: 0; margin-right: 0; }
  .guide-steps li:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .faq-section { grid-template-columns: 1fr; gap: 50px; padding-bottom: 100px; }
  .contact-section { padding: 60px 30px; }
  .site-footer { grid-template-columns: 1fr auto; padding: 35px 0; }
  .site-footer > p { display: none; }
}

@media (max-width: 520px) {
  :root { --page: calc(100vw - 32px); }
  .brand-mark { width: 29px; height: 29px; }
  .brand-name { font-size: 17px; }
  .hero { padding-top: 56px; gap: 56px; }
  .eyebrow { font-size: 9px; letter-spacing: 0.12em; margin-bottom: 24px; }
  h1 { font-size: clamp(42px, 12.7vw, 60px); line-height: 1.2; }
  .hero-intro { font-size: 14px; line-height: 1.85; }
  .hero-actions { flex-direction: column; align-items: stretch; gap: 10px; }
  .button-primary { justify-content: space-between; }
  .text-link { justify-content: space-between; }
  .hero-footnote { gap: 10px 14px; font-size: 10px; }
  .hero-footnote span + span::before { margin-right: 14px; }
  .terminal-topbar { padding: 0 12px; }
  .terminal-live { font-size: 8px; }
  .terminal-tabs { padding: 0 5px; }
  .terminal-tabs button { font-size: 10px; }
  .chat-screen { min-height: 360px; padding: 20px 12px; }
  .bot-bubble { min-width: 0; width: 100%; }
  .message { gap: 8px; }
  .avatar { flex-basis: 27px; height: 27px; }
  .terminal-statusbar { align-items: flex-start; flex-direction: column; gap: 5px; }
  .terminal-note { margin-left: 0; }
  .ticker-track { font-size: 11px; gap: 13px 16px; }
  .section { padding: 90px 0; }
  .section-no { font-size: 9px; margin-bottom: 18px; }
  h2 { font-size: clamp(34px, 10vw, 44px); }
  .section-heading { margin-bottom: 48px; }
  .world-grid { grid-template-columns: 1fr; }
  .world-item { min-height: 280px; padding: 26px; }
  .world-item h3 { font-size: 23px; }
  .world-item p { padding-right: 20px; }
  .strength-row h3 { font-size: 19px; }
  .bridge-diagram { padding: 26px 20px; }
  .bridge-node { grid-template-columns: 38px 1fr; gap: 6px 12px; }
  .bridge-node > span { width: 36px; height: 36px; }
  .bridge-node small { font-size: 10px; line-height: 1.6; }
  .release-title { font-size: 14px; line-height: 1.6; }
  .release-detail { padding-right: 0; }
  .guide-steps { grid-template-columns: 1fr; }
  .guide-steps li { min-height: 190px; border-right: 0 !important; border-bottom: 1px solid var(--line); margin-right: 0 !important; }
  .guide-steps h3 { margin-top: 34px; }
  .faq-list summary { font-size: 13px; line-height: 1.6; padding: 18px 0; }
  .contact-section { width: 100%; margin-bottom: 0; min-height: 570px; padding: 60px 20px; }
  .contact-section h2 { font-size: 38px; }
  .contact-section p br { display: none; }
  .qq-button { min-height: 108px; grid-template-columns: 1fr auto; gap: 8px; padding: 18px; text-align: left; }
  .qq-label { grid-column: 1; }
  .qq-button strong { grid-column: 1; font-size: 32px; }
  .qq-action { grid-column: 2; grid-row: 1 / 3; }
  .site-footer { min-height: 170px; grid-template-columns: 1fr; gap: 24px; }
  .site-footer > div { align-items: flex-start; }
  .toast { width: max-content; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}