:root {
  --canvas: #f5f6ef;
  --paper: #fffefa;
  --paper-strong: #ffffff;
  --ink: #14201d;
  --ink-soft: #31403a;
  --muted: #6c7871;
  --line: #d8e0d8;
  --line-strong: #aebbb2;
  --accent: #d9ff58;
  --accent-strong: #c0e742;
  --accent-ink: #172514;
  --coral: #ff765c;
  --sky: #dceefa;
  --success: #38a66a;
  --shadow: 0 22px 60px rgba(20, 32, 29, 0.13), 0 3px 12px rgba(20, 32, 29, 0.08);
  --shadow-small: 0 10px 28px rgba(20, 32, 29, 0.1), 0 2px 7px rgba(20, 32, 29, 0.06);
  --display: Georgia, "Times New Roman", serif;
  --body: "Aptos Display", Aptos, "Trebuchet MS", sans-serif;
  --mono: "Cascadia Code", Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 82% 4%, rgba(217, 255, 88, 0.35), transparent 24rem),
    radial-gradient(circle at 6% 34%, rgba(220, 238, 250, 0.65), transparent 22rem),
    var(--canvas);
  font-family: var(--body);
  line-height: 1.45;
  overflow-x: hidden;
}
button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, select:focus-visible { outline: 3px solid var(--coral); outline-offset: 3px; }

.noise { position: fixed; inset: 0; z-index: 20; pointer-events: none; opacity: 0.09; 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='.78' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.28'/%3E%3C/svg%3E"); }
.page-grid { position: fixed; inset: 0; pointer-events: none; opacity: 0.28; background-image: linear-gradient(rgba(20, 32, 29, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(20, 32, 29, 0.035) 1px, transparent 1px); background-size: 42px 42px; mask-image: linear-gradient(to bottom, black, transparent 60%); }
.site-header, main, footer { width: min(1180px, calc(100% - 64px)); margin-inline: auto; }
.site-header { position: relative; z-index: 1; min-height: 72px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--ink); text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 36px; height: 36px; color: var(--accent); background: var(--ink); border-radius: 11px; box-shadow: 4px 4px 0 var(--accent-strong); transition: transform 180ms ease, box-shadow 180ms ease; }
.brand:hover .brand-mark { transform: translate(2px, 2px); box-shadow: 3px 3px 0 var(--accent-strong); }
.brand-mark svg { width: 20px; height: 20px; }
.brand-copy { display: grid; gap: 0; letter-spacing: 0.1em; line-height: 1; }
.brand-copy strong { font-size: 14px; }
.brand-copy small { margin-top: 5px; color: var(--muted); font: 700 9px/1 var(--mono); letter-spacing: 0.08em; }
.header-right { display: flex; align-items: center; gap: 18px; }
.header-note { color: var(--muted); font: 700 10px/1 var(--mono); letter-spacing: 0.1em; }
.header-link { color: var(--ink-soft); font: 800 10px/1 var(--mono); letter-spacing: 0.1em; text-decoration: none; transition: color 180ms ease; }
.header-link:hover { color: var(--coral); }
.language-picker { position: relative; }
.language-picker::after { content: "⌄"; position: absolute; top: 50%; right: 11px; color: var(--muted); font: 800 13px/1 var(--mono); pointer-events: none; transform: translateY(-58%); }
.language-picker select { min-width: 118px; height: 38px; padding: 0 31px 0 12px; border: 1px solid var(--line-strong); border-radius: 10px; outline: 0; appearance: none; color: var(--ink); background: rgba(255, 254, 250, 0.78); font: 800 11px/1 var(--body); cursor: pointer; }
.language-picker select:hover { border-color: var(--ink); }
.server-pill, .ready-badge, .job-status { display: inline-flex; align-items: center; gap: 8px; color: var(--ink-soft); font: 800 10px/1 var(--mono); letter-spacing: 0.09em; }
.server-pill i, .ready-badge i, .job-status::before { width: 8px; height: 8px; display: inline-block; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 4px rgba(56, 166, 106, 0.13); }

.hero { position: relative; z-index: 1; min-height: 530px; display: grid; place-items: center; padding: clamp(62px, 8vw, 92px) 0 58px; text-align: center; }
.hero-copy { width: min(100%, 820px); min-width: 0; animation: reveal 700ms cubic-bezier(.2,.8,.2,1) both; }
.eyebrow { display: flex; align-items: center; gap: 10px; margin: 0 0 19px; color: var(--muted); font: 800 10px/1 var(--mono); letter-spacing: 0.18em; text-transform: uppercase; }
.eyebrow-index { color: var(--coral); }
.hero .eyebrow { justify-content: center; margin-bottom: 15px; }
.hero h1 { max-width: 760px; margin: 0 auto; font: 700 clamp(40px, 4.6vw, 64px)/0.96 var(--display); letter-spacing: -0.06em; }
.hero h1 em { color: var(--coral); font-weight: 400; }
.lede { max-width: 660px; margin: 20px auto 0; color: var(--muted); font-size: clamp(14px, 1.25vw, 16px); line-height: 1.55; }
.url-console { max-width: 760px; margin: 27px auto 0; text-align: left; }
.field-heading, .choice-heading { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-bottom: 10px; }
.field-heading label, .choice-heading label { color: var(--ink-soft); font-size: 12px; font-weight: 900; letter-spacing: 0.08em; text-transform: uppercase; }
.field-heading span, .choice-heading span { color: var(--muted); font: 700 9px/1 var(--mono); letter-spacing: 0.1em; }
.url-row { display: grid; grid-template-columns: 34px 1fr auto; min-height: 54px; overflow: hidden; border: 1px solid var(--line-strong); border-radius: 12px; background: rgba(255, 254, 250, 0.88); box-shadow: var(--shadow-small); transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease; }
.url-row:focus-within { border-color: var(--ink); box-shadow: 0 0 0 4px rgba(217, 255, 88, 0.65), var(--shadow-small); transform: translateY(-2px); }
.url-prefix { display: grid; place-items: center; color: var(--coral); font: 700 23px/1 var(--display); }
.url-row input { min-width: 0; border: 0; outline: 0; background: transparent; color: var(--ink); font-size: 14px; }
.url-row input::placeholder { color: #9aa59f; }
.url-row button, .primary-button { border: 0; color: var(--paper); background: var(--ink); cursor: pointer; font-weight: 900; text-decoration: none; transition: background 180ms ease, transform 180ms ease, box-shadow 180ms ease; }
.url-row button { min-width: 128px; display: inline-flex; align-items: center; justify-content: space-between; gap: 15px; padding: 0 16px; font-size: 13px; }
.url-row button:hover, .primary-button:hover { background: #263c35; transform: translateY(-2px); box-shadow: 0 8px 18px rgba(20, 32, 29, 0.16); }
.url-row button:active, .primary-button:active { transform: translateY(0); box-shadow: none; }
.url-row button:disabled, .primary-button:disabled { opacity: 0.65; cursor: wait; transform: none; box-shadow: none; }
.button-icon { color: var(--accent); font-size: 21px; line-height: 1; }
.form-message { min-height: 26px; margin: 14px 0 0; color: var(--muted); font-size: 13px; font-weight: 700; }
.form-message[data-tone="error"] { color: var(--coral); }
.form-message[data-tone="success"] { color: var(--success); }
.is-loading .button-icon { display: inline-block; width: 15px; height: 15px; border: 2px solid rgba(217, 255, 88, 0.35); border-top-color: var(--accent); border-radius: 50%; animation: spin 700ms linear infinite; font-size: 0; }
.platform-strip { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 8px; margin-top: 22px; text-align: left; }
.platform-card { position: relative; min-width: 0; display: flex; align-items: center; gap: 9px; padding: 10px 9px; overflow: hidden; border: 1px solid var(--line); border-radius: 13px; color: var(--ink); background: rgba(255, 254, 250, 0.72); box-shadow: 0 5px 15px rgba(20, 32, 29, 0.04); text-decoration: none; transition: border-color 180ms ease, background 180ms ease, transform 180ms ease, box-shadow 180ms ease; }
.platform-card::before { content: ""; position: absolute; inset: auto 0 0; height: 2px; background: var(--platform-color, var(--ink)); transform: scaleX(.35); transform-origin: left; transition: transform 180ms ease; }
.platform-card:hover { border-color: var(--platform-color, var(--ink)); background: var(--paper-strong); box-shadow: 0 10px 24px rgba(20, 32, 29, 0.1); transform: translateY(-3px); }
.platform-card:hover::before { transform: scaleX(1); }
.platform-icon { flex: 0 0 28px; width: 28px; height: 28px; display: grid; place-items: center; border-radius: 9px; color: var(--platform-color, var(--ink)); background: color-mix(in srgb, var(--platform-color, var(--ink)) 13%, white); }
.platform-icon svg { width: 17px; height: 17px; }
.platform-icon-letter { font: 900 18px/1 Georgia, serif; }
.platform-card-copy { min-width: 0; display: grid; gap: 4px; }
.platform-card-copy strong { overflow: hidden; color: var(--ink); font: 800 10px/1 var(--body); letter-spacing: -.02em; text-overflow: ellipsis; white-space: nowrap; }
.platform-card-copy small { color: var(--muted); font: 800 7px/1 var(--mono); letter-spacing: .08em; white-space: nowrap; }
.platform-card-arrow { margin-left: auto; color: var(--platform-color, var(--muted)); font: 800 14px/1 var(--mono); opacity: .8; transition: transform 180ms ease; }
.platform-card:hover .platform-card-arrow { transform: translate(2px, -2px); }
.platform-card-tiktok { --platform-color: #111; }
.platform-card-douyin { --platform-color: #167d86; }
.platform-card-kuaishou { --platform-color: #ff4b20; }
.platform-card-instagram { --platform-color: #c13584; }
.platform-card-facebook { --platform-color: #1877f2; }
.platform-card-pinterest { --platform-color: #bd081c; }

.hero-signal { display: none; }
.signal-window { position: relative; overflow: hidden; border: 1px solid var(--line-strong); border-radius: 22px; background: rgba(255, 254, 250, 0.9); box-shadow: var(--shadow); transform: rotate(2deg); }
.signal-window::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(135deg, rgba(217, 255, 88, 0.18), transparent 42%); }
.signal-chrome { position: relative; z-index: 1; display: grid; grid-template-columns: 76px 1fr auto; align-items: center; min-height: 52px; padding: 0 20px; border-bottom: 1px solid var(--line); background: rgba(245, 246, 239, 0.76); }
.traffic-lights { display: flex; gap: 6px; }
.traffic-lights i { width: 8px; height: 8px; display: block; border-radius: 50%; background: var(--coral); }
.traffic-lights i:nth-child(2) { background: #e5bd58; }
.traffic-lights i:nth-child(3) { background: var(--success); }
.signal-title, .signal-code { color: var(--muted); font: 800 9px/1 var(--mono); letter-spacing: 0.1em; }
.signal-code { color: var(--ink-soft); }
.signal-body { position: relative; z-index: 1; padding: 39px 40px 42px; }
.signal-route { display: grid; gap: 6px; padding: 18px 20px; border: 1px solid var(--line); border-radius: 13px; background: var(--paper-strong); }
.signal-route-output { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.signal-label { color: var(--coral); font: 800 10px/1 var(--mono); letter-spacing: 0.15em; }
.signal-route-output .signal-label { color: var(--accent); }
.signal-route strong { font: 700 clamp(19px, 2.2vw, 25px)/1.05 var(--display); letter-spacing: -0.04em; }
.signal-route small { color: var(--muted); font: 600 10px/1.3 var(--mono); }
.signal-route-output small { color: #b9c7bf; }
.signal-arrow { width: 38px; height: 42px; display: grid; place-items: center; margin: 0 auto; color: var(--coral); font: 700 25px/1 var(--display); animation: float 2.7s ease-in-out infinite; }
.signal-footer { position: relative; z-index: 1; display: flex; justify-content: space-between; gap: 18px; padding: 15px 22px; border-top: 1px solid var(--line); color: var(--muted); font: 700 10px/1 var(--mono); }
.signal-footer i { width: 6px; height: 6px; display: inline-block; margin-right: 5px; border-radius: 50%; background: var(--success); }
.signal-caption { margin: 24px 0 0; color: var(--muted); font-size: 12px; font-weight: 700; }
.signal-caption span { color: var(--coral); font-family: var(--mono); }

.result-card, .job-panel { position: relative; z-index: 1; width: min(100%, 980px); margin: 24px auto 0; border: 1px solid var(--line-strong); border-radius: 18px; background: rgba(255, 254, 250, 0.94); box-shadow: var(--shadow); animation: card-in 520ms cubic-bezier(.2,.8,.2,1) both; }
.result-card { display: grid; grid-template-columns: minmax(260px, 0.78fr) minmax(0, 1.22fr); grid-template-rows: auto 1fr; overflow: hidden; }
.result-topline { grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 17px 23px 14px; border-bottom: 1px solid var(--line); }
.result-topline .eyebrow { margin: 0; }
.ready-badge { color: var(--success); }
.ready-badge i { width: 6px; height: 6px; box-shadow: none; }
.media-preview { position: relative; min-height: 270px; overflow: hidden; background: var(--sky); }
.media-preview::after { content: ""; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(150deg, rgba(217, 255, 88, 0.22), transparent 38%, rgba(20, 32, 29, 0.12)); mix-blend-mode: multiply; }
.media-preview img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.thumbnail-placeholder { min-height: 270px; display: grid; place-content: center; gap: 8px; color: var(--ink); text-align: center; background: linear-gradient(145deg, var(--accent), #edf6b3); }
.thumbnail-placeholder span { display: block; font: 700 clamp(72px, 10vw, 132px)/0.75 var(--display); letter-spacing: -0.1em; transform: rotate(-7deg); }
.thumbnail-placeholder small { color: var(--ink-soft); font: 800 9px/1 var(--mono); letter-spacing: 0.16em; }
.duration-badge { position: absolute; z-index: 1; right: 17px; bottom: 17px; padding: 7px 9px; border-radius: 7px; color: var(--paper); background: var(--ink); font: 800 11px/1 var(--mono); }
.media-details { padding: clamp(22px, 2.8vw, 32px); }
.source-label { margin: 0 0 13px; color: var(--coral); font: 800 10px/1 var(--mono); letter-spacing: 0.16em; text-transform: uppercase; }
.media-details h2, .job-panel h2 { overflow: hidden; overflow-wrap: anywhere; display: -webkit-box; -webkit-box-orient: vertical; max-width: 680px; margin: 0 0 8px; font: 700 clamp(21px, 2.15vw, 30px)/1.1 var(--display); letter-spacing: -0.04em; }
.media-details h2 { -webkit-line-clamp: 3; }
.job-panel h2 { -webkit-line-clamp: 2; }
.muted { margin: 0; color: var(--muted); font-size: 13px; font-weight: 700; }
.choice-heading { margin-top: 20px; }
.media-details select { width: 100%; min-height: 46px; padding: 0 13px; border: 1px solid var(--line-strong); border-radius: 10px; outline: 0; background: var(--canvas); color: var(--ink); font-size: 12px; font-weight: 800; transition: border-color 180ms ease, box-shadow 180ms ease; }
.media-details select:focus { border-color: var(--ink); box-shadow: 0 0 0 4px rgba(217, 255, 88, 0.56); }
.primary-button { min-height: 46px; margin-top: 10px; padding: 0 15px; display: inline-flex; align-items: center; justify-content: space-between; gap: 18px; border-radius: 10px; font-size: 12px; }
.media-details .primary-button { width: 100%; }

.job-panel { padding: clamp(22px, 2.8vw, 32px); }
.job-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; }
.job-heading .eyebrow { margin-bottom: 17px; }
.job-status-wrap { display: flex; align-items: center; gap: 20px; }
.job-status { padding: 8px 10px; border: 1px solid var(--line); border-radius: 99px; background: var(--canvas); }
.job-status::before { width: 6px; height: 6px; box-shadow: none; background: #dfb454; }
.job-panel[data-status="downloading"] .job-status { color: var(--ink); border-color: rgba(255, 118, 92, 0.36); background: rgba(255, 118, 92, 0.1); }
.job-panel[data-status="downloading"] .job-status::before { background: var(--coral); animation: status-pulse 1.5s ease-in-out infinite; }
.job-panel[data-status="complete"] .job-status { color: var(--success); border-color: rgba(56, 166, 106, 0.3); background: rgba(56, 166, 106, 0.09); }
.job-panel[data-status="complete"] .job-status::before { background: var(--success); }
.job-panel[data-status="failed"] .job-status { color: var(--coral); border-color: rgba(255, 118, 92, 0.3); background: rgba(255, 118, 92, 0.09); }
.job-panel[data-status="failed"] .job-status::before { background: var(--coral); }
.job-panel[data-status="cancelled"] .job-status { color: var(--muted); border-color: var(--line); background: var(--canvas); }
.job-panel[data-status="cancelled"] .job-status::before { background: var(--muted); }
.job-heading strong { font: 700 clamp(34px, 4vw, 48px)/0.86 var(--display); letter-spacing: -0.06em; }
.progress-track { height: 12px; margin-top: 20px; overflow: hidden; padding: 2px; border: 1px solid var(--line-strong); border-radius: 99px; background: var(--canvas); }
.progress-track div { width: 0; height: 100%; border-radius: 99px; background: linear-gradient(90deg, var(--coral), var(--accent-strong)); transition: width 300ms cubic-bezier(.2,.8,.2,1); }
.job-meta { min-height: 38px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-top: 11px; color: var(--muted); font-size: 12px; font-weight: 700; }
.job-actions { display: flex; align-items: center; justify-content: flex-end; gap: 13px; margin-top: 14px; }
.job-actions .primary-button { margin-top: 0; }
.ghost-button { min-height: 50px; padding: 0 18px; border: 1px solid var(--line-strong); border-radius: 11px; background: transparent; color: var(--ink); cursor: pointer; font-weight: 900; transition: background 180ms ease, transform 180ms ease; }
.ghost-button:hover { background: var(--accent); transform: translateY(-2px); }

.douyin-guide, .steps-section, .faq-section { position: relative; z-index: 1; scroll-margin-top: 28px; padding-top: 110px; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 28px; border-top: 1px solid var(--ink); padding-top: 27px; }
.section-heading .eyebrow { margin-bottom: 18px; }
.section-heading h2 { max-width: 760px; margin: 0; font: 700 clamp(34px, 4.4vw, 58px)/0.97 var(--display); letter-spacing: -0.06em; }
.section-lede { max-width: 740px; margin: 23px 0 0; color: var(--muted); font-size: 15px; line-height: 1.6; }
.pilot-badge { flex: 0 0 auto; padding: 10px 13px; border: 1px solid rgba(255, 118, 92, 0.38); border-radius: 99px; color: var(--coral); background: rgba(255, 118, 92, 0.08); font: 800 9px/1 var(--mono); letter-spacing: 0.1em; }
.capability-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 45px; }
.capability-card { min-height: 235px; display: flex; flex-direction: column; padding: clamp(25px, 3vw, 36px); overflow: hidden; border: 1px solid var(--line-strong); border-radius: 19px; background: rgba(255, 254, 250, 0.9); box-shadow: var(--shadow-small); }
.capability-card-video { background: linear-gradient(145deg, var(--sky), rgba(255, 254, 250, 0.94)); }
.capability-card-audio { background: linear-gradient(145deg, rgba(217, 255, 88, 0.64), rgba(255, 254, 250, 0.96)); }
.capability-card-links { min-height: 205px; grid-column: 1 / -1; display: grid; grid-template-columns: minmax(220px, 0.75fr) minmax(300px, 1.25fr); column-gap: 40px; align-items: start; background: var(--ink); color: var(--paper); }
.capability-index { color: var(--coral); font: 800 10px/1 var(--mono); letter-spacing: 0.13em; }
.capability-card-audio .capability-index { color: var(--ink-soft); }
.capability-card h3 { margin: auto 0 11px; font: 700 clamp(25px, 2.8vw, 36px)/1 var(--display); letter-spacing: -0.045em; }
.capability-card p { max-width: 520px; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; }
.capability-card-links h3 { margin: 42px 0 13px; }
.capability-card-links p { color: #b9c7bf; }
.link-patterns { grid-column: 2; grid-row: 1 / span 3; display: grid; gap: 10px; align-self: center; }
.link-patterns code { display: block; padding: 18px 20px; overflow: hidden; border: 1px solid rgba(255, 255, 255, 0.14); border-radius: 11px; color: var(--accent); background: rgba(255, 255, 255, 0.055); font: 700 12px/1.3 var(--mono); text-overflow: ellipsis; white-space: nowrap; }
.inline-cta { width: fit-content; display: inline-flex; align-items: center; gap: 18px; margin-top: 24px; padding: 14px 18px; border: 1px solid var(--ink); border-radius: 99px; color: var(--ink); font-weight: 900; text-decoration: none; transition: color 180ms ease, background 180ms ease, transform 180ms ease; }
.inline-cta:hover { color: var(--paper); background: var(--ink); transform: translateY(-2px); }
.inline-cta span:last-child { color: var(--coral); font-size: 20px; }

.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 44px; border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); }
.steps-grid article { min-height: 220px; padding: 26px 28px 30px 0; border-right: 1px solid var(--line); }
.steps-grid article + article { padding-left: 30px; }
.steps-grid article:last-child { border-right: 0; }
.steps-grid span { color: var(--coral); font: 700 28px/1 var(--display); }
.steps-grid h3 { margin: 54px 0 11px; font: 700 24px/1 var(--display); letter-spacing: -0.04em; }
.steps-grid p { max-width: 330px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.6; }

.faq-list { margin-top: 42px; border-top: 1px solid var(--line-strong); }
.faq-list details { border-bottom: 1px solid var(--line-strong); }
.faq-list summary { position: relative; padding: 22px 55px 22px 0; list-style: none; color: var(--ink); font: 700 clamp(19px, 2vw, 25px)/1.2 var(--display); cursor: pointer; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; top: 50%; right: 5px; color: var(--coral); font: 400 30px/1 var(--display); transform: translateY(-50%); transition: transform 180ms ease; }
.faq-list details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-list p { max-width: 780px; margin: -5px 0 0; padding: 0 55px 25px 0; color: var(--muted); font-size: 14px; line-height: 1.65; }

.principles { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(3, 1fr); margin: 110px 0 84px; border-top: 1px solid var(--ink); }
.principles article { min-height: 175px; padding: 25px 28px 25px 0; border-right: 1px solid var(--line); }
.principles article + article { padding-left: 28px; }
.principles article:last-child { border-right: 0; }
.principles span { color: var(--coral); font: 700 24px/1 var(--display); }
.principles h3 { margin: 26px 0 8px; font: 700 25px/1 var(--display); letter-spacing: -0.04em; }
.principles p { max-width: 280px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.55; }
footer { position: relative; z-index: 1; display: flex; justify-content: space-between; gap: 24px; padding: 25px 0 42px; border-top: 1px solid var(--line); color: var(--muted); font: 700 11px/1.5 var(--mono); }
footer > span { color: var(--ink); letter-spacing: 0.08em; }
footer p { max-width: 560px; margin: 0; text-align: right; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 14px; max-width: 560px; }
.footer-links a { color: var(--muted); font-size: 11px; font-weight: 800; letter-spacing: .02em; text-decoration: none; }
.footer-links a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }

[hidden] { display: none !important; }
@keyframes reveal { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
@keyframes card-in { from { opacity: 0; transform: translateY(20px) scale(0.99); } to { opacity: 1; transform: translateY(0) scale(1); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes float { 0%, 100% { transform: translateY(-2px); } 50% { transform: translateY(4px); } }
@keyframes status-pulse { 0%, 100% { transform: scale(0.82); opacity: 0.65; } 50% { transform: scale(1.18); opacity: 1; } }

@media (max-width: 900px) {
  .site-header, main, footer { width: min(100% - 40px, 720px); }
  .hero { min-height: 500px; padding-top: 68px; }
  .hero h1 { font-size: clamp(40px, 8vw, 58px); }
  .header-link, .header-note { display: none; }
  .platform-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .result-card { grid-template-columns: 1fr; }
  .media-preview { min-height: 260px; }
  .thumbnail-placeholder { min-height: 260px; }
  .capability-card-links { grid-template-columns: 1fr; }
  .link-patterns { grid-column: 1; grid-row: auto; margin-top: 30px; }
}

@media (max-width: 620px) {
  .site-header, main, footer { width: min(100% - 24px, 520px); }
  .site-header { min-height: 64px; }
  .header-note { display: none; }
  .server-pill { font-size: 0; }
  .header-right { gap: 12px; }
  .language-picker select { min-width: 106px; height: 36px; font-size: 10px; }
  .hero { min-height: auto; padding: 48px 0 36px; }
  .hero h1 { font-size: clamp(36px, 11vw, 48px); }
  .lede { margin-top: 18px; font-size: 14px; }
  .url-console { margin-top: 23px; }
  .url-row { grid-template-columns: 31px 1fr; }
  .url-row input { min-height: 54px; padding-right: 13px; font-size: 13px; }
  .url-row button { grid-column: 1 / -1; min-height: 48px; border-top: 1px solid rgba(255,255,255,0.17); }
  .platform-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 7px; margin-top: 20px; }
  .platform-card { padding: 9px 8px; }
  .platform-icon { flex-basis: 26px; width: 26px; height: 26px; }
  .platform-card-copy strong { font-size: 9px; }
  .platform-card-copy small { font-size: 6px; }
  .signal-window { transform: none; border-radius: 17px; }
  .signal-chrome { grid-template-columns: 62px 1fr auto; min-height: 46px; padding: 0 15px; }
  .signal-body { padding: 28px 20px 32px; }
  .signal-route { padding: 18px; }
  .signal-footer { padding: 12px 15px; }
  .result-topline { align-items: flex-start; flex-direction: column; padding: 16px 18px; }
  .media-preview, .thumbnail-placeholder { min-height: 210px; }
  .media-details { padding: 20px 18px 18px; }
  .media-details h2 { font-size: 22px; }
  .choice-heading { margin-top: 18px; }
  .job-panel { padding: 20px 18px 18px; }
  .job-heading { align-items: flex-start; flex-direction: column; }
  .job-status-wrap { width: 100%; justify-content: space-between; }
  .job-panel h2 { font-size: 21px; }
  .job-heading strong { font-size: 40px; }
  .job-meta { align-items: flex-start; flex-direction: column; gap: 5px; }
  .job-actions { align-items: stretch; flex-direction: column-reverse; }
  .job-actions > * { width: 100%; justify-content: center; }
  .douyin-guide, .steps-section, .faq-section { padding-top: 78px; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .section-heading h2 { font-size: 37px; }
  .section-lede { font-size: 15px; }
  .capability-grid { grid-template-columns: 1fr; margin-top: 32px; }
  .capability-card, .capability-card-links { min-height: 230px; grid-column: auto; display: flex; }
  .capability-card h3, .capability-card-links h3 { margin: auto 0 12px; }
  .link-patterns { width: 100%; margin-top: 24px; }
  .steps-grid { grid-template-columns: 1fr; }
  .steps-grid article, .steps-grid article + article { min-height: auto; padding: 25px 0 29px; border-right: 0; border-bottom: 1px solid var(--line); }
  .steps-grid article:last-child { border-bottom: 0; }
  .steps-grid h3 { margin-top: 33px; }
  .faq-list summary { padding-right: 45px; font-size: 22px; }
  .faq-list p { padding-right: 36px; }
  .principles { grid-template-columns: 1fr; margin: 76px 0 55px; }
  .principles article, .principles article + article { min-height: auto; padding: 21px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .principles article:last-child { border-bottom: 0; }
  .principles h3 { margin-top: 18px; }
  footer { align-items: flex-start; flex-direction: column; gap: 10px; }
  footer p { text-align: left; }
  .footer-links { justify-content: flex-start; max-width: none; }
}

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