/* 展如信息首页 v2：亮色 · 水流丝带 */
:root {
  --ink: #0b1f33;
  --slate: #52637a;
  --mute: #7a8ba0;
  --faint: #627288;
  --line: #e3e9f0;
  --line-2: #dce3eb;
  --soft: #f6f9fc;
  --pill: #f2f6fa;
  --accent: #1f78c9;
  --accent-soft: #eef4fb;
  --accent-hover: #dceaf8;
  --green: #12a58a;
  --amber: #b26a00;
  --navy: #0b1f33;
  --radius: 14px;
  --shadow-float: 0 18px 40px -16px rgba(11, 31, 51, .35);
  --shadow-panel: 0 16px 36px -18px rgba(11, 31, 51, .35);
  --sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --plex: 'IBM Plex Sans', 'Noto Sans SC', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --ease: cubic-bezier(.2, .7, .1, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body.v2 { margin: 0; background: #fff; color: var(--ink); font-family: var(--sans); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; overflow-x: hidden; }
:where(body.v2 h1, body.v2 h2, body.v2 h3, body.v2 p) { margin: 0; }
body.v2 a { color: var(--accent); text-decoration: none; }
body.v2 a:hover { color: var(--ink); }
body.v2 button { font-family: inherit; }
body.v2 img { max-width: 100%; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.w { width: min(1200px, 100% - 48px); margin-inline: auto; }
.plex { font-family: var(--plex); }
.mono { font-family: var(--mono); }
.pl { white-space: pre-line; }
.muted { color: var(--mute); }
.hl { color: var(--accent); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* structural guide lines */
.guides { position: absolute; inset: 0; pointer-events: none; z-index: 0; }
.guides .w { position: relative; height: 100%; border-inline: 1px dashed #e8edf3; }
.guides .w::before, .guides .w::after { content: ''; position: absolute; top: 0; bottom: 0; border-left: 1px dashed #eef2f6; }
.guides .w::before { left: 33.333%; }
.guides .w::after { left: 66.666%; }
main { position: relative; }
main > section, main > div { position: relative; z-index: 1; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 48px; padding: 0 22px; border-radius: 8px; border: 1px solid transparent; font-size: 16px; font-weight: 500; line-height: 1; cursor: pointer; white-space: nowrap; transition: transform .2s, filter .2s, background .2s, border-color .2s; }
.btn svg { width: 12px; height: 12px; flex-shrink: 0; transition: transform .2s; }
.btn:hover svg { transform: translateX(2px); }
body.v2 .btn-p { background: var(--accent); color: #fff; }
body.v2 .btn-p:hover { color: #fff; filter: brightness(1.08); transform: translateY(-1px); }
body.v2 .btn-s { background: #fff; border-color: var(--line-2); color: var(--ink); }
body.v2 .btn-s:hover { background: var(--soft); color: var(--ink); }
body.v2 .btn-w { background: #fff; color: var(--ink); }
body.v2 .btn-w:hover { color: var(--ink); filter: brightness(.95); }
.btn-sm { height: 40px; padding: 0 16px; font-size: 14px; }

.plus { width: 44px; height: 44px; flex-shrink: 0; display: inline-flex; align-items: center; justify-content: center; border: 0; border-radius: 10px; background: var(--accent-soft); color: var(--accent); cursor: pointer; transition: background .2s; }
.plus:hover { background: var(--accent-hover); }
.plus svg { width: 16px; height: 16px; transition: transform .3s var(--ease); }
[aria-expanded="true"] > .plus svg, .plus[aria-expanded="true"] svg, .plus.is-x svg { transform: rotate(45deg); }

/* ---------- header ---------- */
.hd { position: sticky; top: 0; z-index: 50; transition: background .3s, box-shadow .3s; }
.hd.is-scrolled { background: rgba(255, 255, 255, .86); -webkit-backdrop-filter: saturate(1.6) blur(14px); backdrop-filter: saturate(1.6) blur(14px); box-shadow: 0 1px 0 var(--line); }
.hd-in { height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.hd-left { display: flex; align-items: center; gap: 48px; }
body.v2 .brand { display: flex; align-items: center; gap: 10px; color: var(--ink); }
.brand svg { width: 30px; height: 28px; }
.brand-zh { font-size: 18px; font-weight: 600; letter-spacing: .08em; }
.nav { display: flex; align-items: center; gap: 32px; font-size: 15px; font-weight: 500; }
body.v2 .nav a { color: var(--ink); transition: opacity .2s; }
body.v2 .nav a:hover { opacity: .6; }
body.v2 .nav a.active { color: var(--accent); }
.nav-mobile { display: none; }
.hd-right { display: flex; align-items: center; gap: 12px; }
.lang { display: inline-flex; align-items: center; height: 40px; padding: 3px; border-radius: 8px; background: rgba(255, 255, 255, .85); border: 1px solid var(--line); }
.lang-btn { height: 32px; min-width: 38px; padding: 0 10px; border: 0; border-radius: 6px; background: transparent; color: var(--slate); font-size: 13px; font-weight: 500; cursor: pointer; }
.lang-btn.active { background: var(--ink); color: #fff; }
.menu-toggle { display: none; width: 44px; height: 44px; border: 0; border-radius: 10px; background: rgba(255, 255, 255, .9); cursor: pointer; position: relative; }
.menu-toggle .hamburger, .menu-toggle .hamburger::before { position: absolute; left: 13px; width: 18px; height: 2px; border-radius: 1px; background: var(--ink); transition: transform .3s var(--ease), top .3s; }
.menu-toggle .hamburger { top: 18px; }
.menu-toggle .hamburger::before { content: ''; left: 0; top: 7px; }
.menu-toggle.active .hamburger { top: 21px; transform: rotate(45deg); }
.menu-toggle.active .hamburger::before { top: 0; transform: rotate(-90deg); }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; margin-top: -72px; padding-top: 72px; min-height: 772px; }
.ribbon { position: absolute; right: 0; top: 0; width: min(57vw, 820px); height: auto; aspect-ratio: 820 / 772; overflow: visible; pointer-events: none; }
.hero-in { position: relative; z-index: 2; padding: 104px 0 120px; }
.live { display: inline-flex; align-items: center; gap: 10px; padding: 6px 12px 6px 10px; border-radius: 999px; background: var(--pill); font-family: var(--plex); font-size: 13px; color: var(--slate); }
.live .clock { font-family: var(--mono); color: var(--ink); min-width: 64px; }
.dot { position: relative; width: 8px; height: 8px; flex-shrink: 0; }
.dot::before, .dot::after { content: ''; position: absolute; inset: 0; border-radius: 50%; background: var(--green); }
.dot::after { animation: ping 2.2s ease-out infinite; }
.hero h1 { max-width: 780px; margin-top: 28px; font-size: clamp(30px, 3.1vw, 44px); line-height: 1.36; font-weight: 500; letter-spacing: -.01em; }
.hero h1 > span { animation: up .9s var(--ease) both; }
.hero h1 > span:nth-child(2) { animation-delay: .08s; }
.hero h1 > span:nth-child(3) { animation-delay: .16s; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 44px; animation: up .9s var(--ease) .3s both; }

.chip { position: absolute; z-index: 2; display: flex; align-items: center; gap: 12px; padding: 14px 16px; border-radius: 10px; background: rgba(255, 255, 255, .94); box-shadow: var(--shadow-float); animation: float 6s ease-in-out infinite; }
.chip-ic { width: 32px; height: 32px; border-radius: 8px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.chip-ic svg { width: 16px; height: 16px; }
.chip b { display: block; font-size: 14px; font-weight: 500; }
.chip small { display: block; font-size: 12px; color: var(--slate); }
.chip-1 { right: max(24px, 10.4vw); top: 330px; }
.chip-2 { right: max(200px, 25vw); top: 470px; animation-delay: -2s; }
.chip-3 { right: max(24px, 7.6vw); top: 580px; animation-delay: -4s; }
.ic-green { background: #e3f6f1; color: var(--green); }
.ic-amber { background: #fff4e0; color: var(--amber); }
.ic-blue { background: #e6f1fb; color: var(--accent); }

/* ---------- tech strip ---------- */
.stack { border-block: 1px solid #eef2f6; background: #fff; }
.stack-in { min-height: 120px; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding: 24px 0; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-family: var(--plex); font-size: 19px; font-weight: 600; letter-spacing: -.01em; color: #8795a8; filter: grayscale(1); opacity: .75; transition: filter .3s, opacity .3s, color .3s; }
.logo img { width: 26px; height: 26px; }
.logo img.wordmark { width: auto; height: 36px; }
.logo img.wide { width: 88px; height: 88px; margin: -31px -6px; }
.logo:hover { filter: none; opacity: 1; color: var(--ink); }

/* ---------- section heads ---------- */
.sec { padding: 104px 0; }
.lede { font-size: clamp(24px, 2.3vw, 32px); line-height: 1.45; font-weight: 500; }
.sec-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 40px; }
.sec-head .lede { max-width: 760px; }
.hint { font-family: var(--mono); font-size: 12px; color: var(--faint); white-space: nowrap; }
.sec-head-split { display: flex; justify-content: space-between; align-items: flex-start; gap: 48px; }
.sec-head-split > p { max-width: 420px; font-size: 17px; line-height: 1.8; color: var(--slate); }
.sec-head-split .lede + .btn { margin-top: 28px; }

/* ---------- bento ---------- */
.bento { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 56px; }
.card { position: relative; display: flex; flex-direction: column; min-height: 400px; border-radius: var(--radius); border: 1px solid var(--line); background: #fff; overflow: hidden; transition: box-shadow .3s, transform .3s; }
.card:hover { box-shadow: 0 30px 60px -20px rgba(11, 31, 51, .18), 0 18px 36px -18px rgba(11, 31, 51, .2); }
.card.span2 { grid-column: span 2; }
.card.tall { min-height: 440px; }
.mock { position: relative; flex: 0 0 260px; overflow: hidden; background: var(--soft); }
.card.tall .mock { flex-basis: 300px; }
.card-foot { flex: 1; display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; padding: 24px 28px; }
.card-foot .tag { font-family: var(--mono); font-size: 12px; color: var(--accent); }
.card-foot h3 { margin-top: 6px; font-size: 21px; font-weight: 600; }
.card-foot p { margin-top: 6px; font-size: 15px; color: var(--slate); }

.panel { border-radius: 10px; background: #fff; box-shadow: var(--shadow-panel); }
.panel-head { display: flex; justify-content: space-between; gap: 12px; font-size: 13px; }
.panel-head b { font-weight: 500; }
.panel-head span { color: var(--slate); }
.ok { display: inline-flex; align-items: center; gap: 6px; color: var(--green) !important; }
.ok i { width: 6px; height: 6px; border-radius: 50%; background: currentColor; animation: blink 2.2s ease-in-out infinite; }

.mock-l01 { display: flex; gap: 30px; align-items: flex-start; padding: 36px 40px; background-color: #e7f2fc; background-image: radial-gradient(circle at 12% 110%, #62b6f7 0, rgba(98, 182, 247, 0) 45%), radial-gradient(circle at 70% -10%, #c8f3ea 0, rgba(200, 243, 234, 0) 50%); }
.mock-l01 .panel { flex: 1 1 0; padding: 18px 20px; display: flex; flex-direction: column; gap: 14px; }
.mock-l01 .panel + .panel { margin-top: 34px; animation: float 8s ease-in-out infinite; }
.node { display: flex; align-items: center; gap: 12px; font-size: 12px; color: var(--slate); }
.node .mono { width: 58px; }
.node .bar { flex: 1; height: 6px; border-radius: 3px; background: #eef2f6; overflow: hidden; }
.node .bar i { display: block; height: 100%; border-radius: 3px; background: var(--accent); transform-origin: left center; animation: breathe 3.2s ease-in-out infinite; }
.node .v { width: 34px; text-align: right; color: var(--ink); }
.spark { width: 100%; height: 86px; display: block; }
.spark path { stroke-dasharray: 600; animation: draw 4s ease-out infinite; }

.mock-l02 svg { width: 100%; height: 100%; display: block; }
.mock-l02 .link { animation: flow 3s linear infinite; }

.mock-l03 { padding: 28px; }
.mock-l03 .panel { height: 100%; padding: 16px 18px; display: flex; flex-direction: column; gap: 14px; box-shadow: 0 12px 30px -18px rgba(11, 31, 51, .35); }
.line { position: relative; display: flex; justify-content: space-between; font-size: 12px; }
.line::before { content: ''; position: absolute; left: 4%; right: 4%; top: 13px; height: 2px; background: #eef2f6; }
.line .belt { position: absolute; top: 10px; left: 4%; width: 8px; height: 8px; border-radius: 2px; background: var(--accent); animation: belt 3.6s linear infinite; }
.line span:not(.belt) { position: relative; padding: 4px 10px; border-radius: 6px; background: var(--accent-soft); }
.line span.warn { background: #fff4e0; color: #8a5300; }
.bars { flex: 1; display: flex; align-items: flex-end; gap: 6px; min-height: 60px; }
.bars i { flex: 1; border-radius: 2px 2px 0 0; background: var(--accent); transform-origin: bottom center; animation: bars 2.4s ease-in-out infinite; }
.bars i.hot { background: #f2a93b; }

.mock-l04 { display: flex; align-items: center; gap: 24px; padding: 32px 40px; }
.mock-l04 .old { flex: 0 0 240px; padding: 16px 18px; border-radius: 10px; background: #fff; border: 1px solid var(--line); display: flex; flex-direction: column; gap: 10px; font-size: 13px; color: var(--slate); }
.mock-l04 .new { flex: 1; padding: 16px 18px; display: flex; flex-direction: column; gap: 10px; font-size: 13px; }
.mock-l04 .k { font-family: var(--mono); font-size: 11px; color: var(--faint); }
.mock-l04 .new .k { color: var(--accent); }
.li { display: flex; align-items: center; gap: 8px; }
.li::before { content: ''; width: 6px; height: 6px; flex-shrink: 0; background: #a9b4c2; }
.new .li::before { background: var(--accent); }
.arrow { flex: 0 0 120px; height: 40px; }
.arrow .link { animation: flow 3s linear infinite; }
.prog { display: flex; flex-direction: column; gap: 6px; margin-top: 4px; }
.prog-label { display: flex; justify-content: space-between; font-size: 12px; color: var(--slate); }
.prog-track { height: 6px; border-radius: 3px; background: #eef2f6; overflow: hidden; }
.prog-track i { display: block; height: 100%; width: 8%; border-radius: 3px; background: var(--accent); animation: fill 5s cubic-bezier(.4, 0, .2, 1) infinite; }

.sheet { position: absolute; inset: 0; z-index: 3; display: flex; flex-direction: column; gap: 14px; padding: 28px; border-radius: var(--radius); background: #fff; animation: sheet .35s var(--ease) both; }
.sheet[hidden] { display: none; }
.sheet .tag { font-family: var(--mono); font-size: 12px; color: var(--accent); }
.sheet h3 { font-size: 22px; font-weight: 600; }
.sheet .fit { font-size: 15px; line-height: 1.7; color: var(--slate); }
.caps { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; list-style: none; }
.caps li { padding: 6px 12px; border-radius: 999px; background: var(--pill); font-size: 13px; }
.sheet-foot { margin-top: auto; display: flex; align-items: flex-end; gap: 16px; }
.first { flex: 1; display: flex; flex-direction: column; gap: 4px; padding: 14px 16px; border-radius: 10px; background: var(--accent-soft); }
.first b { font-size: 12px; font-weight: 600; color: var(--accent); }
.first span { font-size: 15px; }

/* ---------- dark band ---------- */
.band-wrap { padding: 0 16px; }
.band { position: relative; overflow: hidden; width: min(1232px, 100%); margin-inline: auto; border-radius: 20px; background: var(--navy); color: #fff; padding: 88px 72px 56px; }
.band-glow { position: absolute; left: -200px; top: -260px; width: 1500px; height: 600px; opacity: .55; overflow: visible; pointer-events: none; }
.band-grid { position: relative; display: grid; grid-template-columns: minmax(0, 500px) minmax(0, 560px); justify-content: space-between; gap: 48px; }
.band-copy { display: flex; flex-direction: column; gap: 24px; }
.band-copy .eyebrow { font-family: var(--mono); font-size: 13px; color: #85c4f5; }
.band-copy h2 { font-size: clamp(28px, 2.8vw, 40px); line-height: 1.35; font-weight: 500; }
.band-copy p { font-size: 17px; line-height: 1.8; color: #afc0d3; }
.band-act { display: flex; flex-wrap: wrap; align-items: center; gap: 20px; margin-top: 8px; }
.price { font-size: 15px; color: #afc0d3; }
.price b { font-family: var(--plex); font-size: 22px; font-weight: 600; color: #fff; margin-right: 4px; }
.console { border-radius: 12px; background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .12); align-self: start; }
.console-head { height: 52px; display: flex; align-items: center; justify-content: space-between; padding: 0 20px; border-bottom: 1px solid rgba(255, 255, 255, .1); font-size: 14px; }
.console-head .scan-tag { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: #7fe0c8; }
.console-head .scan-tag i { width: 7px; height: 7px; border-radius: 50%; background: currentColor; animation: blink 2.2s ease-in-out infinite; }
.console ul { position: relative; margin: 0; padding: 0; list-style: none; }
.console ul::before { content: ''; position: absolute; left: 0; right: 0; top: 0; height: 56px; background: rgba(133, 196, 245, .08); animation: scan 3.8s ease-in-out infinite alternate; pointer-events: none; }
.console li { position: relative; height: 56px; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 0 20px; border-bottom: 1px solid rgba(255, 255, 255, .06); font-size: 15px; }
.st { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; }
.st::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.st-ok { color: #7fe0c8; }
.st-blue { color: #85c4f5; }
.st-warn { color: #f6c26b; }
.st-mute { color: #afc0d3; }
.console-foot { height: 48px; display: flex; align-items: center; padding: 0 20px; font-size: 13px; color: #8fa3ba; }
.duties { position: relative; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; margin-top: 72px; padding-top: 28px; border-top: 1px solid rgba(255, 255, 255, .12); }
.duties b { display: block; font-size: 15px; font-weight: 500; }
.duties span { display: block; margin-top: 6px; font-size: 14px; line-height: 1.6; color: #afc0d3; }

/* ---------- stats ---------- */
.stats { text-align: center; }
.shimmer { height: 2px; margin-top: 48px; background-image: linear-gradient(90deg, rgba(31, 120, 201, 0), #1f78c9, #9fe3e0, rgba(31, 120, 201, 0), #85c4f5, rgba(31, 120, 201, 0)); background-size: 200% 100%; animation: shimmer 6s linear infinite; }
.stat-row { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; margin-top: 32px; }
.stat { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.stat b { font-family: var(--plex); font-size: clamp(32px, 3vw, 44px); font-weight: 500; letter-spacing: -.02em; line-height: 1.2; }
.stat b small { font-size: 18px; font-weight: 400; color: var(--slate); margin-left: 4px; letter-spacing: 0; }
.stat > span { font-size: 14px; color: var(--slate); }

/* ---------- accordion ---------- */
.acc { margin-top: 56px; border-top: 1px solid var(--line); }
.acc-item { border-bottom: 1px solid var(--line); transition: background .2s; }
.acc-item:hover { background: var(--soft); }
.acc-btn { width: 100%; min-height: 76px; display: flex; align-items: center; gap: 20px; padding: 12px; border: 0; background: transparent; color: var(--ink); text-align: left; cursor: pointer; }
.acc-n { width: 40px; height: 40px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; border-radius: 8px; background: var(--pill); color: var(--slate); font-family: var(--mono); font-size: 13px; transition: background .3s, color .3s; }
.acc-btn[aria-expanded="true"] .acc-n { background: var(--accent); color: #fff; }
.acc-t { flex: 1; font-size: 19px; font-weight: 500; }
.acc-l { font-family: var(--plex); font-size: 13px; color: var(--slate); margin-right: 12px; text-align: right; }
.acc-panel { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .35s var(--ease); }
.acc-item.is-open .acc-panel { grid-template-rows: 1fr; }
.acc-panel > div { overflow: hidden; }
.acc-body { display: flex; align-items: center; justify-content: space-between; gap: 40px; padding: 0 12px 28px 72px; }
.acc-body b { display: block; font-size: 13px; font-weight: 600; color: var(--accent); }
.acc-body p { margin-top: 8px; font-size: 17px; line-height: 1.7; }
.acc-body a { flex-shrink: 0; font-size: 15px; font-weight: 500; }

/* ---------- method ---------- */
.method { background: var(--soft); }
.steps { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 32px; margin-top: 64px; padding: 0; list-style: none; }
.steps li { display: flex; flex-direction: column; gap: 16px; }
.step-ic { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: 10px; background: #fff; border: 1px solid var(--line-2); color: var(--accent); }
.step-ic svg { width: 18px; height: 18px; }
.steps p { font-size: 15px; line-height: 1.75; color: var(--slate); }
.steps p b { font-weight: 600; color: var(--ink); }

/* ---------- cta ---------- */
.cta { position: relative; overflow: hidden; padding: 112px 0 136px; }
.cta-ribbon { position: absolute; right: -40px; bottom: -120px; width: min(760px, 70vw); height: auto; aspect-ratio: 760 / 600; pointer-events: none; }
.cta-in { position: relative; max-width: 760px; display: flex; flex-direction: column; gap: 28px; }
.cta-in .quote { font-size: 15px; color: var(--slate); }
.cta-in h2 { font-size: clamp(30px, 3.4vw, 48px); line-height: 1.3; font-weight: 500; letter-spacing: -.01em; }
.cta-in > p:not(.quote) { max-width: 620px; font-size: 17px; line-height: 1.8; color: var(--slate); }
.cta-act { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; }
.cta-addr { font-size: 14px; color: var(--faint); }

/* ---------- footer ---------- */
.ft { position: relative; z-index: 1; background: var(--soft); border-top: 1px solid var(--line); padding: 64px 0 32px; }
.ft-top { display: flex; justify-content: space-between; gap: 48px; flex-wrap: wrap; }
.ft-brand { max-width: 320px; display: flex; flex-direction: column; gap: 14px; }
.ft-brand p { font-size: 14px; line-height: 1.7; color: var(--slate); }
.ft-cols { display: flex; gap: 88px; flex-wrap: wrap; font-size: 14px; }
.ft-col { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.ft-col h4 { margin: 0; font-size: 14px; font-weight: 600; }
body.v2 .ft-col a, .ft-col button, .ft-col span { color: var(--slate); }
body.v2 .ft-col a:hover, .ft-col button:hover { color: var(--ink); }
.ft-col button { padding: 0; border: 0; background: none; font-size: 14px; cursor: pointer; }
.ft-bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 12px; color: var(--faint); }
.ft-bottom div { display: flex; gap: 16px; }
body.v2 .ft-bottom a { color: var(--faint); }

/* ---------- wechat modal (main.js) ---------- */
.wechat-modal { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; padding: 24px; background: rgba(11, 31, 51, .45); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }
.wechat-modal-content { width: min(380px, 100%); max-height: 90vh; overflow: auto; padding: 28px; text-align: center; border-radius: 14px; background: #fff; color: var(--ink); box-shadow: 0 30px 80px rgba(11, 31, 51, .3); }
.wechat-modal-content h3 { margin: 0; font-size: 22px; font-weight: 600; }
.wechat-qr-container img { width: 220px; height: 220px; object-fit: contain; margin: 22px auto 12px; border: 1px solid var(--line); border-radius: 8px; display: block; }
.wechat-number { margin: 0; font-weight: 600; }
.wechat-desc { margin: 4px 0 0; color: var(--slate); font-size: 14px; }
.wechat-close-btn { min-height: 44px; margin-top: 20px; padding: 0 24px; border: 0; border-radius: 8px; background: var(--ink); color: #fff; font-weight: 500; cursor: pointer; }

/* ---------- scroll reveal ---------- */
.js .rv { opacity: 0; transform: translateY(24px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.js .rv.in { opacity: 1; transform: none; }

/* ---------- ribbon motion ---------- */
.rb-1 { animation: wave1 11s ease-in-out infinite; }
.rb-2 { animation: wave2 13s ease-in-out infinite; }
.rb-3 { animation: wave3 9s ease-in-out infinite; }
.rb-1, .rb-2, .rb-3 { transform-box: fill-box; transform-origin: center; }
.rb-flow { animation: flow 3s linear infinite; }

@keyframes up { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
@keyframes wave1 { 0%, 100% { transform: translate(0, 0) skewY(0deg); } 50% { transform: translate(-22px, 14px) skewY(-2deg); } }
@keyframes wave2 { 0%, 100% { transform: translate(0, 0) skewY(0deg); } 50% { transform: translate(18px, -12px) skewY(1.6deg); } }
@keyframes wave3 { 0%, 100% { transform: translate(0, 0) scale(1); } 50% { transform: translate(-12px, -18px) scale(1.03); } }
@keyframes flow { to { stroke-dashoffset: -60; } }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: .3; } }
@keyframes ping { 0% { transform: scale(1); opacity: .6; } 100% { transform: scale(3); opacity: 0; } }
@keyframes draw { 0% { stroke-dashoffset: 600; } 60%, 100% { stroke-dashoffset: 0; } }
@keyframes breathe { 0%, 100% { transform: scaleX(1); } 50% { transform: scaleX(.82); } }
@keyframes bars { 0%, 100% { transform: scaleY(1); } 50% { transform: scaleY(.55); } }
@keyframes belt { from { left: 4%; } to { left: 92%; } }
@keyframes fill { 0% { width: 8%; } 70%, 100% { width: 72%; } }
@keyframes sheet { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
@keyframes shimmer { from { background-position: 0% 0; } to { background-position: 200% 0; } }
@keyframes scan { 0% { top: 0; } 100% { top: calc(100% - 56px); } }

/* ---------- responsive ---------- */
@media (max-width: 1100px) {
  .nav { gap: 22px; }
  .hd-left { gap: 32px; }
  .band { padding: 72px 48px 48px; }
  .band-grid { grid-template-columns: 1fr; }
  .console { max-width: 620px; }
  .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 40px; }
  .chip-2 { display: none; }
}

@media (max-width: 960px) {
  .menu-toggle { display: inline-block; }
  .hd-right .lang, .hd-right .btn { display: none; }
  .nav { position: fixed; top: 72px; left: 0; right: 0; height: calc(100vh - 72px); height: calc(100dvh - 72px); overflow-y: auto; z-index: 49; display: flex; flex-direction: column; align-items: stretch; gap: 0; padding: 16px 24px 32px; background: #fff; font-size: 18px; opacity: 0; visibility: hidden; transform: translateY(-8px); transition: opacity .25s, transform .25s, visibility .25s; }
  .nav.active { opacity: 1; visibility: visible; transform: none; }
  .nav > a { padding: 16px 0; border-bottom: 1px solid var(--line); }
  .nav-mobile { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 24px; }
  .nav-mobile .btn { color: #fff; }
  .bento { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .card.span2 { grid-column: span 2; }
  .stat-row { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 36px; }
  .duties { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sec-head, .sec-head-split { flex-direction: column; align-items: flex-start; gap: 24px; }
  .guides .w::before, .guides .w::after { display: none; }
}

@media (max-width: 720px) {
  .w { width: calc(100% - 40px); }
  .hd-in { height: 64px; }
  .hero { margin-top: -64px; padding-top: 64px; min-height: 0; }
  .nav { top: 64px; height: calc(100vh - 64px); height: calc(100dvh - 64px); }
  .ribbon { width: 100%; right: -10%; top: -4%; -webkit-mask-image: linear-gradient(180deg, #000 70%, transparent); mask-image: linear-gradient(180deg, #000 70%, transparent); }
  .hero h1 { font-size: 27px; line-height: 1.45; }
  .hero-in { padding: 250px 0 64px; }
  .hero h1 { margin-top: 20px; }
  .hero-cta { flex-direction: column; margin-top: 28px; }
  .hero-cta .btn { width: 100%; height: 52px; }
  .chip-1 { top: 196px; right: 20px; padding: 10px 12px; }
  .chip-3 { display: none; }
  .stack-in { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px 8px; justify-items: center; }
  .logo { font-size: 13px; flex-direction: column; gap: 6px; }
  .logo img.wordmark { height: 28px; }
  .logo img.wide { width: 56px; height: 56px; margin: -18px 0; }
  .sec { padding: 72px 0; }
  .bento { grid-template-columns: 1fr; margin-top: 32px; }
  .card.span2 { grid-column: auto; }
  .card, .card.tall { min-height: 0; }
  .mock, .card.tall .mock { flex-basis: 220px; }
  .mock-l01 { padding: 24px 20px; }
  .mock-l01 .panel + .panel { display: none; }
  .mock-l03 { padding: 20px; }
  .mock-l04 { flex-direction: column; align-items: stretch; gap: 8px; padding: 20px; }
  .mock-l04 .old { flex: none; }
  .mock-l04 .old .li:nth-child(n+3) { display: none; }
  .arrow { flex: none; width: 40px; height: 24px; align-self: center; transform: rotate(90deg); }
  .card-foot { padding: 20px; }
  .card-foot h3 { font-size: 19px; }
  .sheet { padding: 20px; overflow: auto; }
  .band-wrap { padding: 0 12px; }
  .band { padding: 44px 20px 28px; border-radius: 18px; }
  .console li { padding: 0 14px; font-size: 14px; }
  .duties { grid-template-columns: 1fr; gap: 20px; margin-top: 40px; }
  .acc-btn { gap: 12px; padding: 12px 0; }
  .acc-n { width: 32px; height: 32px; font-size: 12px; }
  .acc-t { font-size: 16px; line-height: 1.5; }
  .acc-l { display: none; }
  .acc-body { flex-direction: column; align-items: flex-start; gap: 12px; padding: 0 0 20px 44px; }
  .acc-body p { font-size: 15px; }
  .steps { grid-template-columns: 1fr; gap: 24px; margin-top: 32px; }
  .steps li { flex-direction: row; gap: 14px; }
  .step-ic { flex-shrink: 0; }
  .cta { padding: 72px 0 220px; }
  .cta-ribbon { width: 110%; right: -20%; bottom: -60px; }
  .cta-act { flex-direction: column; }
  .cta-act .btn { width: 100%; height: 52px; }
  .ft-cols { gap: 32px; }
  .guides { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .js .rv { opacity: 1; transform: none; }
}