/*
 * 母狗｜母狗内容展厅
 * 设计提醒：深墨放映空间 + 焦点橙焦点 + 胶片片轨 + 时间码索引。
 * 每一处样式应强化“视频制作正在发生”的叙事，避免通用居中卡片与过度圆角。
 */
:root {
  --ink: #10131b;
  --ink-2: #171b26;
  --ink-3: #222938;
  --paper: #f7f1e7;
  --paper-2: #e9e0d4;
  --amber: #ff6b45;
  --amber-soft: #ff916f;
  --sage: #94a69a;
  --blue: #7aa7b8;
  --line: rgba(247, 241, 231, 0.17);
  --muted: #aeb3bd;
  --quiet: #737b89;
  --shadow: 0 20px 55px rgba(4, 5, 9, 0.34);
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --display: "Noto Serif SC", "Songti SC", STSong, serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}
body::selection { background: var(--amber); color: var(--ink); }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { border: 0; }
img { display: block; max-width: 100%; }
:focus-visible { outline: 3px solid var(--amber-soft); outline-offset: 4px; }
.skip-link {
  position: fixed; left: 1rem; top: -5rem; z-index: 100;
  padding: .62rem .92rem; background: var(--paper); color: var(--ink);
  transition: top .16s var(--ease-out);
}
.skip-link:focus { top: 1rem; }

.film-edge {
  position: relative;
}
.film-edge::before,
.film-edge::after {
  content: ""; position: absolute; left: 0; right: 0; height: 10px; z-index: 2;
  background: radial-gradient(circle at 7px 50%, transparent 0 3px, var(--ink) 3.4px 6px, transparent 6.4px) 0 0 / 18px 10px repeat-x;
  opacity: .86; pointer-events: none;
}
.film-edge::before { top: 0; }
.film-edge::after { bottom: 0; transform: rotate(180deg); }

.shell {
  width: min(100% - 2rem, 1420px);
  margin: 0 auto;
}
.section {
  padding: clamp(4.5rem, 8vw, 8.5rem) 0;
  position: relative;
}
.section-paper { background: var(--paper); color: var(--ink); }
.section-ink { background: var(--ink); }
.section-deep { background: var(--ink-2); }
.section-title {
  font-family: var(--display); font-size: clamp(2rem, 4vw, 4rem); line-height: 1.13;
  margin: 0; letter-spacing: -.045em; max-width: 13ch;
}
.section-kicker {
  display: inline-flex; align-items: center; gap: .55rem; margin-bottom: 1.1rem;
  font: 700 .72rem/1 var(--mono); letter-spacing: .13em; text-transform: uppercase;
  color: var(--amber-soft);
}
.section-paper .section-kicker { color: #b43c22; }
.section-kicker::before { content: ""; width: 26px; height: 2px; background: currentColor; }
.section-lede { max-width: 59ch; color: var(--muted); margin: 1.35rem 0 0; font-size: 1.02rem; }
.section-paper .section-lede { color: #565b64; }
.meta-line { font: 700 .69rem/1.5 var(--mono); letter-spacing: .09em; color: var(--quiet); text-transform: uppercase; }

.site-header {
  position: sticky; top: 0; z-index: 40;
  background: rgba(16, 19, 27, .89); border-bottom: 1px solid rgba(247, 241, 231, .1);
  backdrop-filter: blur(16px);
}
.topline {
  min-height: 70px; display: flex; align-items: center; gap: 1.3rem;
}
.brand {
  display: inline-flex; align-items: center; gap: .7rem; flex: 0 0 auto;
  font-family: var(--display); font-weight: 700; letter-spacing: -.03em;
}
.brand img { width: 42px; height: 42px; object-fit: contain; }
.brand strong { display: block; font-size: 1.16rem; line-height: 1; }
.brand span { display: block; margin-top: .28rem; color: var(--quiet); font: 700 .54rem/1 var(--mono); letter-spacing: .16em; }
.nav-toggle { display: none; background: transparent; color: var(--paper); padding: .45rem; margin-left: auto; }
.nav-toggle svg { width: 24px; height: 24px; }
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: 1.25rem; list-style: none; padding: 0; margin: 0; }
.primary-nav a {
  position: relative; color: #d8d4cc; font-size: .86rem; font-weight: 700;
  transition: color .18s var(--ease-out);
}
.primary-nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: -.47rem; height: 2px; background: var(--amber); transform: scaleX(0); transform-origin: left; transition: transform .18s var(--ease-out); }
.primary-nav a:hover, .primary-nav a[aria-current="page"] { color: var(--paper); }
.primary-nav a:hover::after, .primary-nav a[aria-current="page"]::after { transform: scaleX(1); }
.header-cta {
  display: inline-flex; align-items: center; gap: .48rem; margin-left: .45rem; padding: .62rem .84rem;
  background: var(--amber); color: var(--ink); font-size: .78rem; font-weight: 800;
  transition: transform .16s var(--ease-out), background .16s var(--ease-out);
}
.header-cta:hover { background: var(--amber-soft); transform: translateY(-2px); }
.header-cta:active, .button:active { transform: scale(.97); }

.search-strip { background: var(--ink-3); border-bottom: 1px solid var(--line); }
.search-form { min-height: 62px; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: .7rem; align-items: center; }
.search-form label { color: var(--muted); font: 700 .67rem/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.search-form input {
  width: 100%; min-width: 0; appearance: none; color: var(--paper); background: transparent;
  border: 0; border-bottom: 1px solid rgba(247, 241, 231, .23); padding: .75rem .1rem;
}
.search-form input::placeholder { color: #7c8492; }
.search-form input:focus { border-bottom-color: var(--amber); outline: none; }
.search-form button { color: var(--ink); background: var(--paper); padding: .56rem .9rem; font-weight: 800; font-size: .79rem; cursor: pointer; }
.search-result { display: none; grid-column: 2 / 4; margin-top: -.15rem; padding-bottom: .8rem; color: var(--amber-soft); font-size: .84rem; }
.search-result.is-visible { display: block; }

.hero { overflow: hidden; background: #0f1219; }
.hero-grid {
  min-height: min(780px, calc(100vh - 132px)); display: grid; grid-template-columns: minmax(0, .91fr) minmax(460px, 1.25fr);
  align-items: stretch;
}
.hero-copy {
  position: relative; z-index: 3; display: flex; flex-direction: column; justify-content: center;
  padding: clamp(4.7rem, 9vw, 9.5rem) clamp(1.2rem, 4vw, 5rem) clamp(5rem, 9vw, 8rem) 0;
}
.hero-copy::before { content: ""; position: absolute; width: 150px; height: 150px; top: 12%; left: -90px; border-radius: 50%; background: var(--amber); filter: blur(82px); opacity: .14; pointer-events: none; }
.hero-eyebrow { display: flex; align-items: center; gap: .75rem; color: var(--amber-soft); font: 700 .72rem/1.3 var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.hero-eyebrow i { width: 10px; height: 10px; background: var(--amber); border-radius: 50%; box-shadow: 0 0 0 5px rgba(255,107,69,.14); }
.hero h1 { font: 700 clamp(3rem, 6.4vw, 6.7rem)/.98 var(--display); letter-spacing: -.07em; margin: 1.25rem 0 1.4rem; max-width: 7.5ch; }
.hero h1 em { color: var(--amber); font-style: normal; }
.hero p { max-width: 47ch; color: #bec0c7; margin: 0; font-size: 1.03rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2rem; }
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem; cursor: pointer;
  padding: .86rem 1.08rem; background: var(--amber); color: var(--ink); font-weight: 900; font-size: .88rem;
  transition: transform .16s var(--ease-out), background .16s var(--ease-out), color .16s var(--ease-out);
}
.button:hover { transform: translateY(-2px); background: var(--amber-soft); }
.button-ghost { background: transparent; color: var(--paper); border: 1px solid rgba(247, 241, 231, .42); }
.button-ghost:hover { background: var(--paper); color: var(--ink); }
.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: .8rem; margin-top: 4rem; max-width: 520px; }
.hero-stat { border-top: 1px solid rgba(247, 241, 231, .22); padding-top: .65rem; }
.hero-stat strong { display: block; color: var(--paper); font: 700 1.22rem/1 var(--display); }
.hero-stat span { display: block; margin-top: .45rem; color: var(--quiet); font-size: .7rem; }
.hero-visual { position: relative; min-height: 520px; }
.hero-visual::before { content: ""; position: absolute; inset: 0; z-index: 1; background: linear-gradient(90deg, #0f1219 0%, rgba(15,18,25,.33) 42%, rgba(15,18,25,.12) 100%), linear-gradient(0deg, rgba(15,18,25,.78) 0%, transparent 50%); }
.hero-visual img { width: 100%; height: 100%; min-height: 100%; object-fit: cover; filter: saturate(.78) contrast(1.04); }
.hero-frame {
  position: absolute; z-index: 2; left: 7%; bottom: 8%; width: min(82%, 480px); background: rgba(16,19,27,.83);
  border: 1px solid rgba(247,241,231,.24); padding: 1rem; box-shadow: var(--shadow); backdrop-filter: blur(8px);
}
.hero-frame-top { display: flex; justify-content: space-between; color: var(--amber-soft); font: 700 .63rem/1 var(--mono); letter-spacing: .1em; }
.hero-frame h2 { font: 700 clamp(1.3rem, 2vw, 2rem)/1.22 var(--display); margin: .9rem 0 .45rem; }
.hero-frame p { color: #bec0c7; margin: 0; font-size: .8rem; }
.hero-frame .progress { height: 3px; margin-top: 1.2rem; background: rgba(247,241,231,.21); }
.hero-frame .progress i { display: block; width: 68%; height: 100%; background: var(--amber); }
.ticker { overflow: hidden; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #0d0f15; }
.ticker-track { display: flex; width: max-content; animation: ticker 24s linear infinite; }
.ticker-item { display: inline-flex; align-items: center; gap: .7rem; white-space: nowrap; padding: 1rem 1.1rem; color: #ded8cc; font: 700 .75rem/1 var(--mono); letter-spacing: .09em; }
.ticker-item b { color: var(--amber); }
@keyframes ticker { to { transform: translateX(-50%); } }

.featured-layout { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr); gap: clamp(2rem, 5vw, 6rem); align-items: end; }
.video-rail { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1rem; margin-top: 3.2rem; }
.video-card {
  position: relative; overflow: hidden; min-height: 300px; color: var(--paper); background: var(--ink-3);
  box-shadow: 0 10px 30px rgba(0,0,0,.18); isolation: isolate;
}
.video-card:nth-child(1) { grid-column: span 7; min-height: 440px; }
.video-card:nth-child(2) { grid-column: span 5; margin-top: 3rem; }
.video-card:nth-child(3) { grid-column: 3 / span 5; margin-top: -2.2rem; }
.video-card:nth-child(4) { grid-column: 8 / span 5; margin-top: 1.4rem; }
.video-card img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; transition: transform .48s var(--ease-out), filter .48s var(--ease-out); filter: saturate(.72) brightness(.72); }
.video-card::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(0deg, rgba(9,11,16,.95) 2%, rgba(9,11,16,.25) 64%, rgba(9,11,16,.12) 100%); }
.video-card:hover img, .video-card:focus-within img { transform: scale(1.06); filter: saturate(.98) brightness(.82); }
.video-card-body { position: absolute; inset: auto 0 0; z-index: 1; padding: 1.15rem; }
.video-card .meta-line { color: #e9e0d4; opacity: .78; }
.video-card h3 { font: 700 clamp(1.18rem, 2vw, 1.9rem)/1.16 var(--display); margin: .6rem 0 .5rem; letter-spacing: -.035em; }
.video-card p { color: #d9d9dd; margin: 0; font-size: .78rem; line-height: 1.65; max-width: 48ch; }
.video-card-foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .7rem; margin-top: 1rem; font: 700 .68rem/1 var(--mono); color: #d5ccc0; }
.card-play {
  position: absolute; z-index: 2; left: 50%; top: 50%; display: inline-grid; place-items: center; width: 64px; height: 64px;
  background: var(--amber); color: var(--ink); transform: translate(-50%, -50%) scale(.86); opacity: 0;
  transition: opacity .2s var(--ease-out), transform .2s var(--ease-out);
}
.card-play svg { width: 25px; height: 25px; margin-left: 3px; }
.video-card:hover .card-play, .video-card:focus-within .card-play { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.video-card-link { position: absolute; inset: 0; z-index: 3; }
.video-card-link span { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
.featured-aside { padding-bottom: .35rem; }
.topic-tags { display: flex; flex-wrap: wrap; gap: .55rem; margin: 1.7rem 0 2rem; }
.topic-tags a { border: 1px solid rgba(247,241,231,.31); padding: .5rem .65rem; color: #ddd6cb; font-size: .75rem; transition: background .16s var(--ease-out), border-color .16s var(--ease-out); }
.topic-tags a:hover { border-color: var(--amber); background: rgba(255,107,69,.12); }
.aside-note { border-left: 2px solid var(--amber); padding: .2rem 0 .2rem 1rem; color: #c5c6cc; font-size: .85rem; }

.service-frames { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(1.2rem, 3vw, 3rem); margin-top: 3.3rem; }
.service-large { position: relative; min-height: 600px; overflow: hidden; background: #202735; }
.service-large img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; filter: saturate(.72); }
.service-large::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(9,11,16,.95), rgba(9,11,16,.08) 70%); }
.service-large-copy { position: absolute; inset: auto 0 0; z-index: 1; padding: clamp(1.3rem, 3vw, 2.3rem); }
.service-large h3 { font: 700 clamp(1.8rem, 3vw, 3rem)/1.05 var(--display); margin: .55rem 0 .75rem; letter-spacing: -.04em; }
.service-large p { max-width: 52ch; color: #d7d7da; margin: 0; font-size: .88rem; }
.service-list { display: grid; align-content: start; }
.service-row { display: grid; grid-template-columns: 58px 1fr auto; align-items: center; gap: 1rem; padding: 1.2rem 0; border-bottom: 1px solid var(--line); }
.service-row:first-child { border-top: 1px solid var(--line); }
.service-row-no { color: var(--amber); font: 700 .75rem/1 var(--mono); }
.service-row h4 { margin: 0; font: 700 1.14rem/1.2 var(--display); letter-spacing: -.02em; }
.service-row p { margin: .32rem 0 0; color: var(--muted); font-size: .78rem; }
.service-row a { color: var(--amber-soft); font: 800 .75rem/1 var(--mono); }

.ai-frame {
  display: grid; grid-template-columns: minmax(320px, .84fr) minmax(0, 1.16fr); gap: clamp(2rem, 6vw, 7rem); align-items: center;
}
.ai-image { position: relative; }
.ai-image img { width: 100%; aspect-ratio: 4 / 4.7; object-fit: cover; filter: saturate(.72); }
.ai-image::before { content: "AI / 03"; position: absolute; z-index: 2; top: 1rem; right: -1rem; padding: .6rem .7rem; background: var(--amber); color: var(--ink); font: 800 .68rem/1 var(--mono); letter-spacing: .11em; }
.ai-image::after { content: ""; position: absolute; right: -1rem; bottom: -1rem; width: 48%; height: 35%; border-right: 1px solid var(--amber); border-bottom: 1px solid var(--amber); }
.ai-copy { position: relative; }
.ai-copy .section-title { max-width: 10ch; }
.tool-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .8rem; margin-top: 2.2rem; }
.tool-card { padding: 1.1rem 1rem; background: #252b38; border-top: 2px solid transparent; transition: transform .18s var(--ease-out), border-color .18s var(--ease-out); }
.tool-card:hover { transform: translateY(-4px); border-top-color: var(--amber); }
.tool-card b { display: block; color: var(--amber-soft); font: 700 .66rem/1 var(--mono); letter-spacing: .08em; }
.tool-card h3 { margin: .65rem 0 .3rem; font: 700 1.05rem/1.25 var(--display); }
.tool-card p { margin: 0; color: #c2c4cc; font-size: .76rem; }
.ai-disclaimer { margin-top: 1.5rem; border-left: 2px solid var(--amber); padding-left: .9rem; color: #b7bac2; font-size: .8rem; }

.community-top { display: grid; grid-template-columns: minmax(0, 1fr) minmax(310px, .75fr); gap: clamp(2rem, 5vw, 6rem); align-items: end; }
.community-visual { position: relative; min-height: 440px; overflow: hidden; }
.community-visual img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; filter: saturate(.72) contrast(1.02); }
.community-visual::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(16,19,27,.94) 0%, rgba(16,19,27,.05) 72%); }
.community-visual-note { position: absolute; z-index: 1; left: 1.25rem; bottom: 1.2rem; max-width: 38ch; color: #eee5d8; font-size: .84rem; }
.community-visual-note strong { display: block; font: 700 1.5rem/1.1 var(--display); margin-bottom: .6rem; }
.community-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; margin-top: 3rem; background: rgba(16,19,27,.14); border: 1px solid rgba(16,19,27,.2); }
.community-card { min-height: 225px; padding: 1.1rem; background: var(--paper); transition: background .2s var(--ease-out), color .2s var(--ease-out); }
.community-card:hover { background: var(--ink); color: var(--paper); }
.community-card b { color: #a33b25; font: 800 .66rem/1 var(--mono); letter-spacing: .11em; }
.community-card:hover b { color: var(--amber-soft); }
.community-card h3 { font: 700 1.22rem/1.16 var(--display); margin: 1.6rem 0 .55rem; }
.community-card p { margin: 0; color: #555963; font-size: .78rem; }
.community-card:hover p { color: #c6c7cc; }

.guide-layout { display: grid; grid-template-columns: minmax(260px, .56fr) minmax(0, 1.44fr); gap: clamp(2rem, 6vw, 7rem); }
.guide-steps { display: grid; margin-top: .5rem; }
.guide-step { display: grid; grid-template-columns: 56px 1fr; gap: 1rem; padding: 1.05rem 0; border-top: 1px solid rgba(16,19,27,.18); }
.guide-step:last-child { border-bottom: 1px solid rgba(16,19,27,.18); }
.guide-step b { color: #b43c22; font: 800 .75rem/1 var(--mono); padding-top: .18rem; }
.guide-step h3 { margin: 0; font: 700 1.18rem/1.25 var(--display); }
.guide-step p { color: #5e626b; margin: .35rem 0 0; font-size: .84rem; }
.faq-list { margin-top: 3rem; border-top: 1px solid rgba(16,19,27,.22); }
.faq-item { border-bottom: 1px solid rgba(16,19,27,.22); }
.faq-item summary { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.2rem 0; cursor: pointer; list-style: none; font: 700 1.03rem/1.35 var(--display); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; flex: 0 0 auto; color: #b43c22; font: 400 1.75rem/1 var(--sans); transition: transform .2s var(--ease-out); }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { max-width: 63ch; margin: 0; padding: 0 2.1rem 1.2rem 0; color: #555963; font-size: .87rem; }

.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 3.2rem; background: var(--line); }
.trust-card { padding: 1.3rem; min-height: 260px; background: var(--ink-2); }
.trust-card b { color: var(--amber-soft); font: 700 .65rem/1 var(--mono); letter-spacing: .1em; }
.trust-card h3 { font: 700 1.55rem/1.14 var(--display); margin: 2.5rem 0 .7rem; }
.trust-card p { color: #c1c3ca; margin: 0; font-size: .83rem; }
.trust-card a { display: inline-flex; margin-top: 1.3rem; color: var(--amber-soft); font: 800 .76rem/1 var(--mono); }

.contact-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(300px, .95fr); gap: clamp(2rem, 6vw, 7rem); align-items: stretch; }
.contact-panel { padding: clamp(1.25rem, 3vw, 2.2rem); background: #242a37; }
.contact-panel h3 { margin: .55rem 0 1rem; font: 700 clamp(1.55rem, 3vw, 2.6rem)/1.12 var(--display); letter-spacing: -.04em; }
.contact-panel p { color: #c8cbd0; font-size: .85rem; }
.contact-list { margin: 1.8rem 0 0; padding: 0; list-style: none; }
.contact-list li { display: grid; grid-template-columns: 110px 1fr; gap: 1rem; padding: .7rem 0; border-bottom: 1px solid rgba(247,241,231,.14); font-size: .84rem; }
.contact-list b { color: var(--amber-soft); font: 700 .68rem/1.4 var(--mono); letter-spacing: .08em; padding-top: .2rem; }
.contact-list span { color: #e8e1d6; }
.qr-area { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-top: 1.7rem; }
.qr-card { padding: .9rem; background: var(--paper); color: var(--ink); }
.qr-card svg { width: 100%; aspect-ratio: 1; background: white; }
.qr-card b { display: block; margin-top: .65rem; font-size: .75rem; }
.qr-card span { display: block; margin-top: .16rem; color: #656a72; font-size: .66rem; }

.site-footer { border-top: 1px solid var(--line); background: #0c0e14; }
.footer-main { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 2rem; padding: 4rem 0 2.5rem; }
.footer-brand p { max-width: 42ch; color: #aeb2bb; margin-top: 1rem; font-size: .82rem; }
.footer-column h3 { margin: 0 0 1rem; color: var(--amber-soft); font: 700 .65rem/1 var(--mono); letter-spacing: .11em; }
.footer-column ul { list-style: none; padding: 0; margin: 0; }
.footer-column li { margin: .55rem 0; color: #d2d0cb; font-size: .83rem; }
.footer-column a:hover { color: var(--amber-soft); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; padding: 1.1rem 0 1.4rem; color: #777e8b; border-top: 1px solid rgba(247,241,231,.11); font-size: .72rem; }
.footer-bottom strong { color: #cfcac0; }
.share-list { display: flex; flex-wrap: wrap; gap: .4rem; }
.share-button { background: transparent; color: #d1ccc2; border: 1px solid rgba(247,241,231,.19); padding: .38rem .5rem; cursor: pointer; font-size: .7rem; transition: border-color .16s var(--ease-out), color .16s var(--ease-out); }
.share-button:hover { border-color: var(--amber); color: var(--amber-soft); }
.toast { position: fixed; z-index: 99; left: 50%; bottom: 1.4rem; max-width: min(90vw, 460px); transform: translate(-50%, 150%); background: var(--paper); color: var(--ink); padding: .8rem 1rem; box-shadow: var(--shadow); font-size: .82rem; transition: transform .24s var(--ease-out); }
.toast.is-visible { transform: translate(-50%, 0); }

.breadcrumb { display: flex; flex-wrap: wrap; gap: .5rem; padding: 1rem 0; color: #868d99; font-size: .72rem; }
.breadcrumb a:hover { color: var(--amber-soft); }
.breadcrumb span::before { content: "/"; margin-right: .5rem; color: #545c69; }
.page-hero { padding: clamp(4.4rem, 10vw, 9rem) 0 clamp(3.6rem, 7vw, 6.5rem); background: var(--ink-2); }
.page-hero .section-title { max-width: 12ch; }
.page-hero .section-lede { max-width: 65ch; }
.article-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 3rem; }
.article-card { background: #242a37; padding: 1.2rem; min-height: 260px; border-top: 2px solid transparent; transition: transform .18s var(--ease-out), border-color .18s var(--ease-out); }
.article-card:hover { transform: translateY(-4px); border-top-color: var(--amber); }
.article-card h3 { margin: 2rem 0 .7rem; font: 700 1.35rem/1.18 var(--display); }
.article-card p { color: #c2c5cb; margin: 0; font-size: .82rem; }
.article-card .card-link { display: inline-flex; margin-top: 1.3rem; color: var(--amber-soft); font: 700 .72rem/1 var(--mono); }
.callout { border-left: 2px solid var(--amber); background: rgba(255,107,69,.1); padding: 1rem; color: #e8ddd0; margin-top: 1.8rem; font-size: .84rem; }

@media (max-width: 1040px) {
  .primary-nav ul { gap: .85rem; }
  .header-cta { display: none; }
  .hero-grid { grid-template-columns: .92fr 1.08fr; }
  .community-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 800px) {
  .shell { width: min(100% - 1.25rem, 1420px); }
  .topline { min-height: 62px; }
  .nav-toggle { display: inline-flex; }
  .primary-nav { position: absolute; top: 100%; left: 0; right: 0; display: none; padding: .7rem .9rem 1rem; background: var(--ink); border-bottom: 1px solid var(--line); }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0; }
  .primary-nav a { display: block; padding: .8rem .4rem; }
  .primary-nav a::after { display: none; }
  .search-form { grid-template-columns: 1fr auto; padding: .4rem 0; }
  .search-form label { display: none; }
  .search-result { grid-column: 1 / 3; }
  .hero-grid { min-height: auto; grid-template-columns: 1fr; }
  .hero-copy { padding: 4.5rem 0 2.7rem; }
  .hero h1 { max-width: 8.5ch; }
  .hero-stats { margin-top: 2.6rem; }
  .hero-visual { min-height: 410px; }
  .hero-visual::before { background: linear-gradient(0deg, #0f1219 1%, rgba(15,18,25,.18) 70%); }
  .hero-frame { left: .8rem; bottom: 1rem; width: calc(100% - 1.6rem); }
  .featured-layout, .service-frames, .ai-frame, .community-top, .guide-layout, .contact-grid { grid-template-columns: 1fr; }
  .featured-aside { margin-top: -1rem; }
  .video-rail { grid-template-columns: 1fr; gap: 1rem; margin-top: 2rem; }
  .video-card, .video-card:nth-child(n) { grid-column: auto; margin-top: 0; min-height: 320px; }
  .video-card:nth-child(1) { min-height: 380px; }
  .service-large { min-height: 480px; }
  .ai-image { max-width: 520px; }
  .ai-image::before, .ai-image::after { right: 0; }
  .community-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
  .article-list { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 540px) {
  .section { padding: 4rem 0; }
  .brand img { width: 36px; height: 36px; }
  .brand strong { font-size: 1.02rem; }
  .hero-copy { padding-top: 3.4rem; }
  .hero h1 { font-size: clamp(2.75rem, 13vw, 4rem); }
  .hero-actions { display: grid; grid-template-columns: 1fr; }
  .hero-stats { gap: .5rem; }
  .hero-stat strong { font-size: 1.05rem; }
  .hero-stat span { font-size: .62rem; }
  .tool-grid, .qr-area { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: 1fr; }
  .community-card { min-height: auto; }
  .contact-list li { grid-template-columns: 1fr; gap: .25rem; }
  .footer-main { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .article-list { grid-template-columns: 1fr; }
  .footer-bottom { display: grid; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: .01ms !important; }
}