/*
 * 香蕉视频 · 莓糖胶片档案
 * 设计原则：影像先行、档案可读、甜而不腻、不对称节奏。
 * 签名元素：片孔轨道、场记编号、莓焰切角；动画仅使用 transform 与 opacity。
 */

:root {
    --berry: #f04a62;
    --berry-dark: #c92f49;
    --ink: #171923;
    --ink-soft: #2b2e3a;
    --cream: #fff6e8;
    --paper: #fffcf7;
    --white: #ffffff;
    --teal: #29b8a6;
    --lemon: #f6cb45;
    --muted: #6f6b6b;
    --line: rgba(23, 25, 35, 0.16);
    --shadow: 0 18px 55px rgba(23, 25, 35, 0.12);
    --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
    --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
    --shell: min(1240px, calc(100% - 40px));
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

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

body {
    margin: 0;
    color: var(--ink);
    background:
        radial-gradient(circle at 10% 10%, rgba(240, 74, 98, 0.07), transparent 25%),
        linear-gradient(rgba(23, 25, 35, 0.025) 1px, transparent 1px),
        var(--paper);
    background-size: auto, 100% 24px, auto;
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    line-height: 1.72;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9998;
    opacity: 0.035;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}

img,
video {
    display: block;
    max-width: 100%;
}

video {
    background: var(--ink);
}

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

button,
input {
    font: inherit;
}

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

button:focus-visible,
a:focus-visible,
input:focus-visible,
summary:focus-visible {
    outline: 3px solid var(--teal);
    outline-offset: 3px;
}

button:active,
.button:active,
.nav-link:active {
    transform: scale(0.97);
}

.site-shell {
    width: var(--shell);
    margin-inline: auto;
}

.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;
}

.skip-link {
    position: fixed;
    left: 18px;
    top: 14px;
    z-index: 10000;
    padding: 10px 16px;
    color: var(--white);
    background: var(--ink);
    transform: translateY(-160%);
    transition: transform 160ms var(--ease-out);
}

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

.site-header {
    position: relative;
    z-index: 100;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 252, 247, 0.94);
    backdrop-filter: blur(18px);
}

.topline {
    color: var(--cream);
    background: var(--ink);
    font-family: "Space Grotesk", "Noto Sans SC", sans-serif;
    font-size: 12px;
    letter-spacing: 0.09em;
}

.topline-inner {
    min-height: 34px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.topline-update {
    color: rgba(255, 246, 232, 0.72);
}

.brand-row {
    min-height: 94px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    flex: 0 0 auto;
}

.brand img {
    width: 70px;
    height: 70px;
    object-fit: contain;
    border: 1px solid rgba(23, 25, 35, 0.25);
    box-shadow: 5px 5px 0 rgba(240, 74, 98, 0.14);
}

.brand-word {
    display: grid;
    grid-template-columns: auto auto;
    align-items: baseline;
    line-height: 0.92;
}

.brand-word strong {
    position: relative;
    font-size: 28px;
    font-weight: 900;
    letter-spacing: -0.1em;
}

.brand-word strong::after {
    content: "";
    position: absolute;
    right: -8px;
    bottom: 1px;
    width: 8px;
    height: 8px;
    background: var(--berry);
    transform: rotate(45deg);
}

.brand-word em {
    margin-left: 9px;
    color: var(--berry);
    font-family: "Space Grotesk", sans-serif;
    font-size: 23px;
    font-style: normal;
    font-weight: 700;
}

.brand-word small {
    grid-column: 1 / -1;
    margin-top: 7px;
    color: var(--muted);
    font-family: "Space Grotesk", sans-serif;
    font-size: 8px;
    font-weight: 700;
    letter-spacing: 0.2em;
}

.primary-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 5px;
}

.nav-link {
    position: relative;
    padding: 11px 12px 12px;
    color: var(--ink-soft);
    font-size: 13px;
    font-weight: 700;
    transition: color 180ms var(--ease-out), background-color 180ms var(--ease-out), transform 160ms var(--ease-out);
}

.nav-link::after {
    content: "";
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: 7px;
    height: 2px;
    background: var(--berry);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 180ms var(--ease-out);
}

.nav-link:hover,
.nav-link.is-active {
    color: var(--berry-dark);
}

.nav-link:hover::after,
.nav-link.is-active::after {
    transform: scaleX(1);
    transform-origin: left;
}

.nav-toggle {
    display: none;
}

.search-rail {
    border-top: 1px solid var(--line);
    background: var(--cream);
}

.search-inner {
    min-height: 66px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 22px;
}

.scene-label,
.eyebrow {
    margin: 0;
    color: var(--berry-dark);
    font-family: "Space Grotesk", "Noto Sans SC", sans-serif;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.search-form {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: stretch;
    min-width: 0;
}

.search-form input {
    width: 100%;
    min-width: 0;
    border: 1px solid var(--ink);
    border-right: 0;
    border-radius: 0;
    padding: 11px 16px;
    color: var(--ink);
    background: var(--white);
}

.search-form button,
.button,
.preview-button,
.share-buttons button,
.mcp-panel button {
    border: 0;
    color: var(--white);
    background: var(--berry);
    font-weight: 800;
    cursor: pointer;
    transition: transform 160ms var(--ease-out), background-color 180ms var(--ease-out), color 180ms var(--ease-out);
}

.search-form button {
    padding: 11px 20px;
    clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 50%, calc(100% - 12px) 100%, 0 100%);
}

.search-form button:hover,
.button:hover,
.mcp-panel button:hover {
    background: var(--berry-dark);
}

.search-note {
    color: var(--muted);
    font-size: 11px;
    white-space: nowrap;
}

.film-perforation {
    height: 22px;
    background:
        linear-gradient(var(--ink), var(--ink)) center / 100% 8px no-repeat,
        repeating-linear-gradient(90deg, transparent 0 11px, var(--cream) 11px 23px, transparent 23px 34px) top / 100% 7px repeat-x,
        repeating-linear-gradient(90deg, transparent 0 11px, var(--cream) 11px 23px, transparent 23px 34px) bottom / 100% 7px repeat-x,
        var(--ink);
}

.hero {
    position: relative;
    overflow: hidden;
    min-height: 710px;
    background: var(--cream);
}

.hero::before {
    content: "TANGXIN / VIDEO / FIELD NOTES";
    position: absolute;
    left: 2%;
    bottom: 12%;
    color: rgba(23, 25, 35, 0.035);
    font-family: "Space Grotesk", sans-serif;
    font-size: clamp(70px, 10vw, 164px);
    font-weight: 700;
    letter-spacing: -0.05em;
    white-space: nowrap;
}

.hero-grid {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(440px, 1.05fr);
    gap: clamp(38px, 6vw, 92px);
    align-items: center;
    min-height: 690px;
    padding-block: 68px 82px;
}

.hero-copy {
    position: relative;
    z-index: 2;
    padding-left: 44px;
}

.hero-copy::before {
    content: "01";
    position: absolute;
    top: 9px;
    left: 0;
    color: var(--berry);
    font-family: "Space Grotesk", sans-serif;
    font-size: 22px;
    font-weight: 700;
}

.hero h1,
.page-hero h1,
.video-detail h1 {
    margin: 18px 0 24px;
    max-width: 840px;
    font-size: clamp(44px, 6.3vw, 82px);
    font-weight: 900;
    letter-spacing: -0.065em;
    line-height: 1.02;
}

.hero h1 span,
.page-hero h1 span,
.video-detail h1 span {
    position: relative;
    color: var(--berry);
}

.hero h1 span::after,
.page-hero h1 span::after,
.video-detail h1 span::after {
    content: "";
    position: absolute;
    right: -10px;
    bottom: 9px;
    width: 9px;
    height: 9px;
    background: var(--teal);
    transform: rotate(45deg);
}

.hero-lead,
.page-hero p,
.video-detail-lead {
    max-width: 650px;
    margin: 0;
    color: #474650;
    font-size: clamp(17px, 1.65vw, 21px);
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 13px;
    margin-top: 34px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 12px 24px;
    clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 50%, calc(100% - 14px) 100%, 0 100%);
}

.button-secondary {
    color: var(--ink);
    background: transparent;
    box-shadow: inset 0 0 0 1px var(--ink);
    clip-path: none;
}

.button-secondary:hover {
    color: var(--white);
    background: var(--ink);
}

.hero-facts {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    margin-top: 46px;
    border-block: 1px solid var(--line);
}

.hero-facts div {
    padding: 18px 20px 18px 0;
    border-right: 1px solid var(--line);
}

.hero-facts div + div {
    padding-left: 20px;
}

.hero-facts div:last-child {
    border-right: 0;
}

.hero-facts strong {
    display: block;
    font-family: "Space Grotesk", sans-serif;
    font-size: 26px;
    line-height: 1.1;
}

.hero-facts span {
    display: block;
    margin-top: 6px;
    color: var(--muted);
    font-size: 12px;
}

.hero-visual {
    position: relative;
    align-self: stretch;
    min-height: 520px;
    margin-right: -6vw;
}

.hero-image-wrap {
    position: absolute;
    inset: 0;
    overflow: hidden;
    clip-path: polygon(7% 0, 100% 0, 100% 91%, 91% 100%, 0 100%, 0 8%);
    background: var(--ink);
    box-shadow: var(--shadow);
}

.hero-image-wrap::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(255, 246, 232, 0.2), transparent 32%, rgba(23, 25, 35, 0.22));
}

.hero-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-clapper {
    position: absolute;
    z-index: 3;
    left: -44px;
    top: 50px;
    width: 170px;
    padding: 16px 17px;
    color: var(--cream);
    background: var(--ink);
    box-shadow: 0 16px 32px rgba(23, 25, 35, 0.18);
    transform: rotate(-5deg);
}

.hero-clapper::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: -16px;
    height: 16px;
    background: repeating-linear-gradient(135deg, var(--cream) 0 14px, var(--ink) 14px 28px);
}

.hero-clapper span,
.hero-clapper b {
    display: block;
    font-family: "Space Grotesk", sans-serif;
}

.hero-clapper span {
    color: var(--berry);
    font-size: 10px;
    letter-spacing: 0.14em;
}

.hero-clapper b {
    margin-top: 4px;
    font-size: 18px;
}

.hero-status {
    position: absolute;
    z-index: 3;
    right: 24px;
    bottom: 25px;
    max-width: 250px;
    padding: 17px 19px;
    color: var(--ink);
    background: var(--cream);
    box-shadow: var(--shadow);
}

.hero-status span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--berry-dark);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.1em;
}

.hero-status span::before {
    content: "";
    width: 8px;
    height: 8px;
    background: var(--berry);
    border-radius: 50%;
}

.hero-status p {
    margin: 8px 0 0;
    font-size: 13px;
    line-height: 1.5;
}

.ticker {
    overflow: hidden;
    color: var(--cream);
    background: var(--berry);
    border-block: 1px solid var(--ink);
}

.ticker-track {
    display: flex;
    width: max-content;
    padding: 14px 0;
    white-space: nowrap;
}

.ticker-track span {
    display: inline-flex;
    align-items: center;
    font-family: "Space Grotesk", "Noto Sans SC", sans-serif;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.ticker-track span::after {
    content: "◆";
    margin: 0 28px;
    color: var(--lemon);
    font-size: 10px;
}

section {
    position: relative;
}

.section-pad {
    position: relative;
    padding-block: clamp(76px, 10vw, 136px);
}

.section-pad::before {
    content: "";
    position: absolute;
    z-index: 2;
    top: 0;
    left: 0;
    width: 100%;
    height: 11px;
    opacity: 0.62;
    pointer-events: none;
    background:
        linear-gradient(currentColor, currentColor) center / 100% 1px no-repeat,
        repeating-linear-gradient(90deg, transparent 0 9px, currentColor 9px 15px, transparent 15px 25px);
}

.section-dark::before { color: var(--cream); opacity: 0.26; }
.section-cream::before { color: var(--berry-dark); opacity: 0.34; }

.section-dark {
    color: var(--cream);
    background: var(--ink);
}

.section-cream {
    background: var(--cream);
}

.section-berry {
    color: var(--cream);
    background: var(--berry);
}

.section-heading {
    position: relative;
    display: grid;
    grid-template-columns: 86px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
    margin-bottom: 46px;
}

.scene-index {
    padding-top: 10px;
    color: var(--berry);
    border-top: 3px solid currentColor;
    font-family: "Space Grotesk", sans-serif;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.section-heading h2 {
    margin: 0;
    max-width: 860px;
    font-size: clamp(34px, 5vw, 60px);
    font-weight: 800;
    letter-spacing: -0.055em;
    line-height: 1.08;
}

.section-meta {
    grid-column: 2;
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
    margin-top: 2px;
    padding-top: 12px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-family: "Space Grotesk", "PingFang SC", sans-serif;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.1em;
}

.section-dark .section-meta,
.section-berry .section-meta {
    border-color: rgba(255, 246, 232, 0.16);
    color: rgba(255, 246, 232, 0.46);
}

.section-heading p {
    max-width: 760px;
    margin: 16px 0 0;
    color: var(--muted);
    font-size: 17px;
}

.section-dark .section-heading p,
.section-berry .section-heading p {
    color: rgba(255, 246, 232, 0.72);
}

.section-dark .scene-index {
    color: var(--lemon);
}

.section-berry .scene-index {
    color: var(--cream);
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 28px;
}

.video-card {
    grid-column: span 4;
    min-width: 0;
    color: var(--cream);
    border-top: 1px solid rgba(255, 246, 232, 0.22);
    cursor: pointer;
    opacity: 1;
    transform: translateY(0);
    transition: transform 240ms var(--ease-out), opacity 240ms var(--ease-out), border-color 180ms var(--ease-out);
    transition-delay: var(--card-delay);
}

.has-js .video-card {
    opacity: 0;
    transform: translateY(18px);
}

.video-card.is-revealed,
.is-revealed .video-card {
    opacity: 1;
    transform: translateY(0);
}

.video-card:nth-child(1),
.video-card:nth-child(4) {
    grid-column: span 7;
}

.video-card:nth-child(2),
.video-card:nth-child(5) {
    grid-column: span 5;
}

.video-card:nth-child(3) {
    grid-column: 3 / span 8;
}

.video-card:nth-child(2) .video-frame,
.video-card:nth-child(5) .video-frame {
    aspect-ratio: 4 / 3;
}

.video-card:nth-child(3) .video-frame {
    aspect-ratio: 21 / 9;
}

.video-card:nth-child(2) video,
.video-card:nth-child(5) video {
    object-position: 68% center;
}

.video-card:nth-child(3) video {
    object-position: center 35%;
}

.video-card:hover {
    border-color: var(--berry);
    transform: translateY(-7px);
}

.video-frame {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    margin-top: 16px;
    background: #08090e;
    border-top: 7px solid var(--berry);
    box-shadow: inset 0 0 0 1px rgba(255, 246, 232, 0.18);
}

.video-frame::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(0deg, rgba(23, 25, 35, 0.72), transparent 45%);
}

.video-frame video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-button {
    position: absolute;
    z-index: 3;
    left: 22px;
    bottom: 18px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-height: 44px;
    padding: 10px 17px;
    box-shadow: 0 10px 26px rgba(23, 25, 35, 0.3);
}

.preview-button[hidden] {
    display: none;
}

.play-triangle {
    width: 0;
    height: 0;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    border-left: 10px solid var(--white);
}

.duration,
.video-index {
    position: absolute;
    z-index: 3;
    top: 12px;
    padding: 5px 8px;
    font-family: "Space Grotesk", sans-serif;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.duration {
    right: 12px;
    color: var(--ink);
    background: var(--cream);
}

.video-index {
    left: 12px;
    color: var(--cream);
    background: rgba(23, 25, 35, 0.82);
}

.video-copy {
    padding: 24px 2px 18px;
}

.video-copy h3 {
    margin: 11px 0 12px;
    font-size: clamp(22px, 2.3vw, 31px);
    font-weight: 700;
    line-height: 1.28;
    letter-spacing: -0.035em;
}

.video-copy h3 a:hover {
    color: var(--berry);
}

.video-copy > p:not(.eyebrow) {
    margin: 0;
    color: rgba(255, 246, 232, 0.68);
    font-size: 14px;
}

.video-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 16px;
    margin-top: 18px;
    color: rgba(255, 246, 232, 0.74);
    font-size: 11px;
}

.video-stats span::before {
    content: "●";
    margin-right: 6px;
    color: var(--teal);
    font-size: 7px;
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-top: 17px;
}

.tag-list span {
    padding: 4px 9px;
    border: 1px solid rgba(255, 246, 232, 0.24);
    color: rgba(255, 246, 232, 0.82);
    font-size: 11px;
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 18px;
    color: var(--cream);
    font-size: 13px;
    font-weight: 800;
}

.text-link span {
    color: var(--berry);
    font-size: 19px;
    transition: transform 160ms var(--ease-out);
}

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

.feature-split {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: clamp(34px, 7vw, 90px);
    align-items: start;
}

.feature-image {
    position: sticky;
    top: 28px;
}

.feature-image img {
    width: 100%;
    aspect-ratio: 4 / 5;
    object-fit: cover;
    clip-path: polygon(0 0, 100% 6%, 100% 100%, 8% 100%, 0 92%);
    box-shadow: var(--shadow);
}

.feature-image figcaption {
    margin-top: 14px;
    color: var(--muted);
    font-size: 12px;
}

.service-list {
    border-top: 2px solid var(--ink);
}

.service-item {
    display: grid;
    grid-template-columns: 55px 1fr;
    gap: 18px;
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
}

.service-item .service-no {
    color: var(--berry);
    font-family: "Space Grotesk", sans-serif;
    font-size: 13px;
    font-weight: 700;
}

.service-item h3 {
    margin: 0;
    font-size: 23px;
    line-height: 1.3;
}

.service-item p {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 14px;
}

.card-columns {
    columns: 2;
    column-gap: 22px;
}

.info-card {
    break-inside: avoid;
    margin-bottom: 22px;
    padding: 26px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.72);
    box-shadow: 7px 7px 0 rgba(240, 74, 98, 0.1);
}

.info-card::after {
    content: "FIELD NOTE / VERIFIED LAYOUT";
    display: block;
    margin-top: 18px;
    padding-top: 10px;
    color: var(--berry-dark);
    border-top: 1px solid var(--line);
    font-family: "Space Grotesk", sans-serif;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.11em;
}

.info-card:nth-child(2n) {
    transform: translateY(22px);
}

.info-card h3 {
    margin: 0;
    font-size: 21px;
    line-height: 1.35;
}

.info-card p {
    margin: 10px 0 0;
    color: var(--muted);
    font-size: 14px;
}

.ai-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(360px, 0.85fr);
    gap: 28px;
    align-items: stretch;
}

.ai-image {
    position: relative;
    min-height: 560px;
    overflow: hidden;
}

.ai-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.ai-image::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(41, 184, 166, 0.1), rgba(23, 25, 35, 0.78));
}

.ai-caption {
    position: absolute;
    z-index: 2;
    left: 28px;
    right: 28px;
    bottom: 28px;
    color: var(--cream);
}

.ai-caption h3 {
    margin: 8px 0 0;
    font-size: clamp(30px, 4vw, 50px);
    line-height: 1.08;
}

.ai-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

.ai-item {
    position: relative;
    padding: 24px;
    color: var(--cream);
    border: 1px solid rgba(255, 246, 232, 0.18);
    background: rgba(255, 255, 255, 0.035);
}

.ai-item::after {
    content: "AI / HUMAN REVIEW REQUIRED";
    display: block;
    margin-top: 13px;
    color: var(--teal);
    font-family: "Space Grotesk", sans-serif;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.11em;
}

.ai-item h3 {
    margin: 0;
    color: var(--teal);
    font-size: 19px;
}

.ai-item p {
    margin: 9px 0 0;
    color: rgba(255, 246, 232, 0.68);
    font-size: 13px;
}

.community-layout {
    display: grid;
    grid-template-columns: 42% 1fr;
    gap: 0;
    align-items: stretch;
    background: var(--cream);
}

.community-photo {
    min-height: 650px;
}

.community-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.community-copy {
    padding: clamp(48px, 7vw, 96px);
}

.community-copy .section-heading {
    grid-template-columns: 70px 1fr;
}

.community-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px 28px;
}

.community-feature {
    padding-top: 14px;
    border-top: 2px solid var(--berry);
}

.community-feature h3 {
    margin: 0;
    font-size: 18px;
}

.community-feature p {
    margin: 7px 0 0;
    color: var(--muted);
    font-size: 13px;
}

.expert-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 18px;
}

.expert-card {
    grid-column: span 4;
    min-height: 310px;
    padding: 28px;
    color: var(--cream);
    border: 1px solid rgba(255, 246, 232, 0.18);
    background: linear-gradient(155deg, rgba(255, 255, 255, 0.06), transparent 70%);
}

.expert-card:nth-child(4),
.expert-card:nth-child(5) {
    grid-column: span 6;
}

.expert-card .expert-role {
    color: var(--lemon);
    font-family: "Space Grotesk", "Noto Sans SC", sans-serif;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.expert-card h3 {
    margin: 16px 0;
    font-size: 25px;
}

.expert-card p {
    margin: 8px 0;
    color: rgba(255, 246, 232, 0.7);
    font-size: 13px;
}

.expert-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 22px;
}

.expert-actions a {
    padding: 8px 12px;
    border: 1px solid rgba(255, 246, 232, 0.32);
    font-size: 12px;
    font-weight: 800;
}

.expert-actions a:hover {
    color: var(--ink);
    background: var(--cream);
}

.partner-wall {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
}

.partner-mark {
    min-height: 160px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 22px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    text-align: center;
}

.partner-mark strong {
    position: relative;
    color: var(--berry);
    font-family: "Space Grotesk", sans-serif;
    font-size: 25px;
    letter-spacing: 0.08em;
}

.partner-mark strong::before,
.partner-mark strong::after {
    content: "";
    display: inline-block;
    width: 10px;
    height: 10px;
    margin: 0 9px 3px;
    border: 2px solid currentColor;
    transform: rotate(45deg);
}

.partner-mark span {
    color: var(--muted);
    font-size: 12px;
}

.disclosure {
    margin: 22px 0 0;
    padding: 15px 18px;
    border-left: 4px solid var(--teal);
    color: var(--muted);
    background: rgba(41, 184, 166, 0.08);
    font-size: 13px;
}

.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--ink);
    border: 1px solid var(--ink);
}

.step {
    position: relative;
    min-height: 260px;
    padding: 26px;
    background: var(--cream);
}

.step b {
    display: block;
    color: var(--berry);
    font-family: "Space Grotesk", sans-serif;
    font-size: 46px;
    line-height: 1;
}

.step h3 {
    margin: 30px 0 9px;
    font-size: 20px;
}

.step p {
    margin: 0;
    color: var(--muted);
    font-size: 13px;
}

.review-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.review-slot {
    min-height: 220px;
    padding: 24px;
    border: 1px dashed rgba(255, 246, 232, 0.42);
    background: rgba(255, 246, 232, 0.05);
}

.review-slot span {
    color: var(--lemon);
    font-size: 11px;
    font-weight: 800;
}

.review-slot h3 {
    margin: 16px 0 10px;
    font-size: 19px;
}

.review-slot p {
    margin: 0;
    color: rgba(255, 246, 232, 0.68);
    font-size: 13px;
}

.review-slot small {
    display: block;
    margin-top: 18px;
    color: var(--teal);
}

.faq-list {
    counter-reset: tangxin-faq;
    border-top: 2px solid var(--ink);
}

.faq-list details {
    counter-increment: tangxin-faq;
    border-bottom: 1px solid var(--line);
}

.faq-list summary {
    position: relative;
    list-style: none;
    padding: 23px 60px 23px 48px;
    font-size: 18px;
    font-weight: 800;
    cursor: pointer;
}

.faq-list summary::before {
    content: "Q" counter(tangxin-faq, decimal-leading-zero);
    position: absolute;
    left: 0;
    top: 27px;
    color: var(--berry-dark);
    font-family: "Space Grotesk", sans-serif;
    font-size: 10px;
    letter-spacing: 0.09em;
}

.faq-list summary::-webkit-details-marker {
    display: none;
}

.faq-list summary::after {
    content: "+";
    position: absolute;
    right: 0;
    top: 19px;
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    color: var(--cream);
    background: var(--ink);
    font-family: "Space Grotesk", sans-serif;
    font-size: 22px;
}

.faq-list details[open] summary::after {
    content: "−";
    background: var(--berry);
}

.faq-list details p {
    max-width: 880px;
    margin: -4px 0 24px;
    color: var(--muted);
}

.contact-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(360px, 0.72fr);
    gap: 38px;
    align-items: stretch;
}

.contact-visual {
    position: relative;
    min-height: 510px;
    overflow: hidden;
}

.contact-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.contact-visual figcaption {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 18px 22px;
    color: var(--cream);
    background: rgba(23, 25, 35, 0.88);
    font-size: 12px;
}

.contact-card {
    padding: 34px;
    border: 1px solid var(--ink);
    background: var(--cream);
}

.contact-card h3 {
    margin: 0 0 18px;
    font-size: 27px;
}

.contact-card dl {
    margin: 0;
}

.contact-card dt {
    margin-top: 16px;
    color: var(--berry-dark);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.contact-card dd {
    margin: 3px 0 0;
    color: var(--muted);
}

.share-rail {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-top: 36px;
    padding: 20px 0;
    border-block: 1px solid var(--line);
}

.share-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.share-buttons button {
    padding: 8px 12px;
    color: var(--ink);
    border: 1px solid var(--ink);
    background: transparent;
    font-size: 12px;
}

.share-buttons button:hover {
    color: var(--cream);
    background: var(--ink);
}

.page-hero {
    padding-block: clamp(64px, 9vw, 118px);
    background: var(--cream);
}

.page-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(360px, 0.68fr);
    gap: 50px;
    align-items: end;
}

.page-featured .page-hero-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.5fr);
}

.page-featured .page-hero-aside {
    margin-left: -54px;
    margin-bottom: -34px;
}

.page-about .page-hero-grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(390px, 0.62fr);
    align-items: center;
}

.page-about .status-table {
    width: 92%;
    margin-left: 8%;
}

.page-editorial .page-hero-grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(320px, 0.48fr);
    align-items: center;
}

.page-editorial .page-hero-aside {
    transform: translate(-38px, 64px);
}

.page-hero h1 {
    margin-top: 13px;
    font-size: clamp(46px, 6vw, 78px);
}

.page-hero-aside {
    position: relative;
    padding: 24px;
    border-top: 4px solid var(--berry);
    background: var(--white);
    box-shadow: var(--shadow);
    transform: translateY(42px);
}

.page-hero-aside::before {
    content: "CALL SHEET / " attr(data-sheet);
    display: block;
    margin-bottom: 14px;
    color: var(--teal);
    font-family: "Space Grotesk", sans-serif;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.11em;
}

.page-hero-aside strong {
    display: block;
    color: var(--berry-dark);
    font-family: "Space Grotesk", sans-serif;
    font-size: 12px;
    letter-spacing: 0.1em;
}

.page-hero-aside p {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 14px;
}

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    padding-block: 16px;
    color: var(--muted);
    border-bottom: 1px solid var(--line);
    font-size: 12px;
}

.breadcrumb a:hover {
    color: var(--berry-dark);
}

.breadcrumb b {
    color: var(--berry);
}

.video-detail {
    padding-block: 54px 110px;
}

.video-detail-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.62fr) minmax(310px, 0.48fr);
    gap: 34px;
    align-items: start;
}

.detail-player {
    position: sticky;
    top: 24px;
    padding-left: 16px;
}

.detail-player::before {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 8px;
    background: repeating-linear-gradient(180deg, var(--ink) 0 6px, transparent 6px 12px);
}

.detail-player video {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    box-shadow: var(--shadow);
}

.playback-record {
    display: grid;
    grid-template-columns: repeat(5, auto);
    gap: 1px;
    color: var(--cream);
    background: rgba(255, 246, 232, 0.18);
    border-top: 5px solid var(--berry);
}

.playback-record span {
    padding: 10px 11px;
    background: var(--ink);
    font-family: "Space Grotesk", sans-serif;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.08em;
    white-space: nowrap;
}

.playback-record span:last-child {
    color: var(--teal);
}

.detail-meta {
    margin-top: 18px;
    padding: 22px;
    color: var(--cream);
    background: var(--ink);
}

.detail-meta .video-stats {
    margin: 0;
}

.detail-copy {
    padding: 18px 0 0;
    transform: translateY(46px);
}

.video-detail h1 {
    margin: 14px 0 20px;
    font-size: clamp(38px, 5vw, 66px);
}

.video-detail .tag-list span {
    color: var(--ink-soft);
    border-color: var(--line);
    background: var(--white);
}

.lesson-box {
    margin-top: 26px;
    padding: 24px;
    border-left: 6px solid var(--berry);
    background: var(--cream);
}

.lesson-box strong {
    color: var(--berry-dark);
}

.lesson-box p {
    margin: 8px 0 0;
}

.article-copy {
    margin-top: 30px;
    color: var(--muted);
}

.article-copy h2,
.article-copy h3 {
    color: var(--ink);
}

.article-copy h2 {
    margin: 36px 0 12px;
    font-size: 30px;
}

.article-copy h3 {
    margin: 28px 0 10px;
    font-size: 21px;
}

.article-copy p {
    margin: 0 0 18px;
}

.related-videos {
    margin-top: 60px;
    padding-top: 36px;
    border-top: 2px solid var(--ink);
}

.related-videos h2 {
    margin: 7px 0 24px;
    font-size: 34px;
}

.related-list {
    counter-reset: tangxin-related;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.related-link {
    counter-increment: tangxin-related;
    display: grid;
    grid-template-columns: auto 78px 1fr;
    gap: 14px;
    align-items: center;
    padding: 14px;
    border: 1px solid var(--line);
    background: var(--white);
}

.related-link::before {
    content: "A" counter(tangxin-related, decimal-leading-zero);
    color: var(--berry-dark);
    font-family: "Space Grotesk", sans-serif;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.related-link:hover {
    border-color: var(--berry);
}

.related-link img {
    width: 78px;
    height: 58px;
    object-fit: cover;
}

.related-link strong {
    font-size: 13px;
    line-height: 1.45;
}

.notice-box {
    margin: 28px 0;
    padding: 20px 22px;
    border: 1px solid rgba(41, 184, 166, 0.42);
    background: rgba(41, 184, 166, 0.08);
}

.notice-box h3 {
    margin: 0;
    color: var(--ink);
}

.notice-box p {
    margin: 7px 0 0;
}

.site-footer {
    color: var(--cream);
    background: var(--ink);
}

.footer-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.75fr) minmax(300px, 0.8fr);
    gap: 48px;
    padding-block: 72px;
}

.brand-inverse .brand-word strong {
    color: var(--cream);
}

.brand-inverse .brand-word small {
    color: rgba(255, 246, 232, 0.54);
}

.footer-brand h2 {
    max-width: 560px;
    margin: 36px 0 14px;
    font-size: clamp(31px, 4vw, 49px);
    line-height: 1.13;
    letter-spacing: -0.05em;
}

.footer-brand p,
.footer-contact p {
    color: rgba(255, 246, 232, 0.64);
    font-size: 13px;
}

.footer-contact h3 {
    margin: 0 0 20px;
    color: var(--berry);
}

.footer-contact a:hover {
    color: var(--lemon);
}

.footer-qr {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.footer-qr figure {
    margin: 0;
}

.footer-qr img {
    width: 100%;
    aspect-ratio: 1;
    padding: 10px;
    object-fit: contain;
    background: var(--cream);
}

.footer-qr figcaption {
    margin-top: 10px;
    color: rgba(255, 246, 232, 0.58);
    font-size: 11px;
    line-height: 1.5;
}

.mcp-panel {
    display: grid;
    grid-template-columns: 1fr auto minmax(220px, auto);
    gap: 24px;
    align-items: center;
    margin-bottom: 54px;
    padding: 26px;
    border: 1px solid rgba(255, 246, 232, 0.18);
}

.mcp-panel h3 {
    margin: 7px 0 0;
    font-size: 20px;
}

.mcp-panel p {
    margin: 6px 0 0;
    color: rgba(255, 246, 232, 0.56);
    font-size: 12px;
}

.mcp-panel button {
    padding: 11px 16px;
}

.mcp-panel output {
    color: var(--teal);
    font-size: 12px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 246, 232, 0.14);
}

.footer-bottom-inner {
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    color: rgba(255, 246, 232, 0.54);
    font-size: 11px;
}

.toast {
    position: fixed;
    z-index: 9999;
    left: 50%;
    bottom: 24px;
    max-width: min(560px, calc(100% - 32px));
    padding: 13px 18px;
    color: var(--cream);
    background: var(--ink);
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, 18px);
    transition: transform 180ms var(--ease-out), opacity 180ms var(--ease-out);
}

.toast.is-visible {
    opacity: 1;
    transform: translate(-50%, 0);
}

.trust-strip {
    color: rgba(255, 246, 232, 0.82);
    background: var(--ink);
    border-top: 1px solid rgba(255, 246, 232, 0.12);
}

.trust-strip-inner {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 18px;
    min-height: 42px;
    padding-block: 8px;
    font-size: 11px;
}

.trust-strip span,
.trust-strip a {
    position: relative;
    padding-left: 12px;
}

.trust-strip span::before,
.trust-strip a::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.5em;
    width: 5px;
    height: 5px;
    background: var(--teal);
}

.trust-strip b {
    margin-right: 6px;
    color: var(--white);
}

.trust-strip a {
    color: var(--cream);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.trust-dossier {
    padding: 38px 0;
    color: var(--cream);
    background: var(--berry-dark);
    border-block: 1px solid rgba(255, 246, 232, 0.2);
}

.trust-dossier-grid {
    display: grid;
    grid-template-columns: 1.1fr 1.4fr;
    gap: 28px 52px;
    align-items: start;
}

.trust-dossier h2 {
    margin: 10px 0 14px;
    font-size: clamp(30px, 4vw, 48px);
    letter-spacing: -0.045em;
}

.trust-dossier p {
    margin: 0;
    max-width: 720px;
    color: rgba(255, 246, 232, 0.82);
}

.trust-dossier .eyebrow { color: var(--cream); }
.trust-dossier .hero-actions { grid-column: 1 / -1; margin-top: 0; }

.trust-dossier-list {
    display: grid;
    gap: 1px;
    margin: 0;
    background: rgba(255, 246, 232, 0.22);
}

.trust-dossier-list div {
    display: grid;
    grid-template-columns: minmax(140px, 0.55fr) 1.45fr;
    gap: 14px;
    padding: 12px 14px;
    background: rgba(23, 25, 35, 0.24);
}

.trust-dossier-list dt {
    font-weight: 800;
}

.trust-dossier-list dd {
    margin: 0;
    color: rgba(255, 246, 232, 0.78);
}

.trust-dossier-list a { color: var(--white); }

.caption-note {
    margin: 0;
    padding: 11px 14px;
    color: rgba(255, 246, 232, 0.72);
    background: var(--ink);
    border-top: 1px solid rgba(255, 246, 232, 0.14);
    font-size: 12px;
}

.content-byline {
    margin: 30px 0;
    padding: 20px 22px;
    border-left: 6px solid var(--teal);
    background: rgba(41, 184, 166, 0.08);
}

.content-byline p {
    margin: 5px 0;
    font-size: 14px;
}

.status-table {
    border-top: 4px solid var(--berry);
    background: var(--white);
    box-shadow: var(--shadow);
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.status-table dl { margin: 0; }

.status-table dl > div {
    display: grid;
    grid-template-columns: minmax(190px, 0.45fr) 1.55fr;
    gap: 24px;
    padding: 18px 22px;
    border-bottom: 1px solid var(--line);
}

.status-table dt { font-weight: 800; }
.status-table dd { margin: 0; color: var(--muted); }

.policy-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
    gap: 48px;
    align-items: start;
}

.policy-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 18px;
}

.policy-card {
    grid-column: span 4;
    padding: 24px;
    border: 1px solid var(--line);
    background: var(--white);
    box-shadow: 7px 7px 0 rgba(240, 74, 98, 0.09);
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.policy-card:nth-child(2),
.policy-card:nth-child(5) {
    transform: translateY(24px);
}

.page-hero-aside,
.info-card,
.source-card,
.notice-box,
.related-link {
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}

.policy-card:nth-child(4),
.policy-card:nth-child(5) {
    grid-column: span 6;
}

.policy-card > span,
.update-log time {
    color: var(--berry-dark);
    font-family: "Space Grotesk", sans-serif;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.1em;
}

.policy-card h2,
.update-log h2,
.source-card h2 {
    margin: 12px 0 10px;
    font-size: 24px;
    letter-spacing: -0.035em;
}

.evidence-list {
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: evidence;
}

.evidence-list li {
    counter-increment: evidence;
    position: relative;
    padding: 18px 0 18px 54px;
    border-bottom: 1px solid rgba(255, 246, 232, 0.16);
}

.evidence-list li::before {
    content: counter(evidence, decimal-leading-zero);
    position: absolute;
    left: 0;
    color: var(--teal);
    font-family: "Space Grotesk", sans-serif;
    font-weight: 700;
}

.source-card {
    position: sticky;
    top: 24px;
    padding: 28px;
    color: var(--ink);
    background: var(--cream);
    border-top: 5px solid var(--teal);
}

.source-card .text-link { display: block; margin-top: 18px; }

.update-log {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
}

.update-log article {
    padding: 25px;
    background: var(--white);
}

[data-reveal] {
    opacity: 1;
    transform: translateY(0);
    transition: transform 260ms var(--ease-out), opacity 260ms var(--ease-out);
}

.has-js [data-reveal] {
    opacity: 0;
    transform: translateY(24px);
}

[data-reveal].is-revealed {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: no-preference) {
    .ticker-track {
        animation: ticker 38s linear infinite;
    }

    .hero-clapper {
        animation: clapperFloat 5s var(--ease-in-out) infinite alternate;
    }
}

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

@keyframes clapperFloat {
    to { transform: rotate(-2deg) translateY(-7px); }
}

@media (max-width: 1080px) {
    :root { --shell: min(100% - 32px, 960px); }

    .brand-row { gap: 18px; }
    .nav-link { padding-inline: 8px; font-size: 12px; }
    .hero-grid { grid-template-columns: 1fr 0.86fr; }
    .hero-visual { margin-right: -20vw; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-qr { grid-column: 1 / -1; max-width: 400px; }
    .mcp-panel { grid-template-columns: 1fr auto; }
    .mcp-panel output { grid-column: 1 / -1; }
}

@media (max-width: 860px) {
    :root { --shell: min(100% - 28px, 760px); }

    .topline-update { display: none; }
    .brand-row { min-height: 82px; }
    .brand img { width: 58px; height: 58px; box-shadow: 3px 3px 0 rgba(240, 74, 98, 0.14); }

    .nav-toggle {
        display: grid;
        grid-template-columns: 24px auto;
        column-gap: 10px;
        align-items: center;
        border: 0;
        color: var(--ink);
        background: transparent;
        cursor: pointer;
    }

    .nav-toggle span {
        grid-column: 1;
        width: 23px;
        height: 2px;
        margin: 2px 0;
        background: var(--ink);
    }

    .nav-toggle b {
        grid-column: 2;
        grid-row: 1 / span 3;
        font-size: 12px;
    }

    .primary-nav {
        position: absolute;
        left: 0;
        right: 0;
        top: 116px;
        display: grid;
        gap: 0;
        padding: 12px 18px 20px;
        border-bottom: 1px solid var(--line);
        background: var(--paper);
        box-shadow: var(--shadow);
        opacity: 0;
        pointer-events: none;
        transform: translateY(-10px);
        transition: transform 180ms var(--ease-out), opacity 180ms var(--ease-out);
    }

    .primary-nav.is-open {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }

    .nav-link { padding: 13px 10px; }
    .search-inner { grid-template-columns: 1fr; gap: 7px; padding-block: 14px; }
    .search-inner .scene-label,
    .search-note { display: none; }

    .hero { min-height: auto; }
    .hero-grid { grid-template-columns: 1fr; gap: 40px; padding-block: 55px 70px; }
    .hero-copy { padding-left: 35px; }
    .hero h1 { max-width: 720px; }
    .hero-visual { min-height: 520px; margin: 0; }
    .hero-clapper { left: 18px; }

    .video-card,
    .video-card:nth-child(1),
    .video-card:nth-child(2),
    .video-card:nth-child(3),
    .video-card:nth-child(4),
    .video-card:nth-child(5) { grid-column: span 6; }

    .feature-split,
    .ai-layout,
    .contact-layout,
    .page-hero-grid,
    .video-detail-grid { grid-template-columns: 1fr; }
    .page-featured .page-hero-grid,
    .page-about .page-hero-grid,
    .page-editorial .page-hero-grid { grid-template-columns: 1fr; }
    .page-featured .page-hero-aside,
    .page-editorial .page-hero-aside { margin: 0; transform: none; }
    .page-about .status-table { width: 100%; margin-left: 0; }
    .trust-dossier-grid,
    .policy-layout { grid-template-columns: 1fr; }
    .policy-card { grid-column: span 6; }
    .source-card { position: relative; top: auto; }

    .feature-image,
    .detail-player { position: relative; top: auto; }
    .detail-copy,
    .page-hero-aside { transform: none; }
    .playback-record { grid-template-columns: repeat(3, 1fr); }
    .feature-image img { aspect-ratio: 16 / 10; }

    .community-layout { grid-template-columns: 1fr; }
    .community-photo { min-height: 480px; }
    .community-copy { padding: 60px 28px; }

    .expert-card { grid-column: span 6; }
    .expert-card:nth-child(5) { grid-column: 3 / span 8; }
    .steps { grid-template-columns: 1fr 1fr; }
    .review-grid { grid-template-columns: 1fr 1fr; }
    .page-hero-aside { max-width: 580px; }
}

@media (max-width: 620px) {
    :root { --shell: calc(100% - 24px); }

    .topline-inner { justify-content: center; }
    .trust-strip-inner {
        flex-wrap: nowrap;
        gap: 18px;
        overflow-x: auto;
        padding-block: 11px;
        scrollbar-width: thin;
    }
    .trust-strip span,
    .trust-strip a { flex: 0 0 auto; }
    .brand-word strong { font-size: 23px; }
    .brand-word em { font-size: 19px; }
    .nav-toggle b { display: none; }
    .primary-nav { top: 116px; }

    .search-form { grid-template-columns: 1fr auto; }
    .search-form input { padding-inline: 11px; font-size: 12px; }
    .search-form button { width: 54px; padding-inline: 10px; overflow: hidden; color: transparent; font-size: 0; }
    .search-form button::after { content: "搜"; color: var(--white); font-size: 16px; }

    .hero-copy { padding-left: 0; }
    .hero-copy::before { position: static; display: block; margin-bottom: 12px; }
    .hero h1 { font-size: clamp(42px, 14vw, 61px); }
    .hero-lead { font-size: 16px; }
    .hero-actions { display: grid; }
    .button { width: 100%; }
    .hero-facts { grid-template-columns: 1fr; }
    .hero-facts div,
    .hero-facts div + div { padding: 14px 0; border-right: 0; border-bottom: 1px solid var(--line); }
    .hero-facts div:last-child { border-bottom: 0; }
    .hero-visual { min-height: 420px; }
    .hero-clapper { left: 14px; top: 32px; width: 145px; }
    .hero-status { left: 18px; right: 18px; }

    .section-pad { padding-block: 74px; }
    .section-heading { grid-template-columns: 1fr; gap: 12px; }
    .scene-index { width: 70px; }
    .section-heading h2 { font-size: 37px; }
    .section-meta { grid-column: 1; }

    .video-grid { display: block; }
    .video-card { margin-bottom: 48px; }
    .video-copy h3 { font-size: 24px; }

    .feature-image img { aspect-ratio: 4 / 5; }
    .card-columns { columns: 1; }
    .info-card:nth-child(2n) { transform: none; }
    .ai-image { min-height: 440px; }
    .community-photo { min-height: 360px; }
    .community-copy { padding: 50px 20px; }
    .community-features { grid-template-columns: 1fr; }

    .expert-grid { display: block; }
    .expert-card { min-height: auto; margin-bottom: 14px; }
    .partner-wall { grid-template-columns: 1fr 1fr; }
    .partner-mark { min-height: 135px; padding: 14px; }
    .partner-mark strong { font-size: 19px; }
    .steps { grid-template-columns: 1fr; }
    .step { min-height: auto; }
    .review-grid { grid-template-columns: 1fr; }

    .contact-visual { min-height: 380px; }
    .contact-card { padding: 24px; }
    .share-rail { display: block; }
    .share-buttons { margin-top: 16px; }

    .page-hero h1,
    .video-detail h1 { font-size: 43px; }
    .related-list { grid-template-columns: 1fr; }
    .trust-dossier-list div,
    .status-table dl > div { grid-template-columns: 1fr; gap: 6px; }
    .policy-card,
    .policy-card:nth-child(4),
    .policy-card:nth-child(5) { grid-column: 1 / -1; }
    .update-log { grid-template-columns: 1fr; }
    .policy-card:nth-child(2),
    .policy-card:nth-child(5) { transform: none; }
    .detail-player { padding-left: 10px; }
    .related-link { grid-template-columns: auto 68px 1fr; }
    .playback-record { grid-template-columns: 1fr 1fr; }

    .footer-grid { grid-template-columns: 1fr; gap: 34px; padding-block: 58px; }
    .footer-qr { grid-column: auto; }
    .mcp-panel { grid-template-columns: 1fr; }
    .mcp-panel output { grid-column: auto; }
    .footer-bottom-inner { display: block; padding-block: 18px; }
}

@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;
    }
}