/* 万能画布 v1.10 · 未登录产品首页
   所有规则均以 guest-landing / landing- 为作用域，避免影响画布与项目工作台。 */

.guest-landing[hidden],
.project-home[hidden] {
    display: none !important;
}

body.guest-home {
    min-width: 320px;
    overflow-x: hidden;
    background: #080a10;
}

body.guest-home > .footer {
    display: none !important;
}

.guest-landing {
    --landing-bg: #080a10;
    --landing-panel: #111315;
    --landing-panel-soft: #17191c;
    --landing-line: rgba(255, 255, 255, 0.1);
    --landing-text: #f6f7f8;
    --landing-muted: #9da3ad;
    --landing-green: #66e0b8;
    --landing-green-strong: #28c896;
    min-height: 100vh;
    overflow: hidden;
    position: relative;
    isolation: isolate;
    color: var(--landing-text);
    background:
        radial-gradient(ellipse 58% 48% at 13% 22%, rgba(91, 78, 188, 0.19), transparent 72%),
        radial-gradient(ellipse 55% 46% at 88% 20%, rgba(35, 199, 151, 0.17), transparent 72%),
        radial-gradient(ellipse 46% 40% at 52% 66%, rgba(44, 113, 132, 0.09), transparent 76%),
        linear-gradient(135deg, #0a0c15 0%, #080b10 38%, #07120f 70%, #090a11 100%);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.guest-landing::before {
    content: '';
    position: fixed;
    z-index: 0;
    inset: 0;
    opacity: 0.34;
    background-image:
        linear-gradient(115deg, rgba(138, 123, 244, 0.055), transparent 34%, rgba(91, 232, 187, 0.045) 70%, transparent),
        radial-gradient(circle, rgba(214, 227, 239, 0.17) 0.7px, transparent 0.9px);
    background-size: 100% 100%, 22px 22px;
    mask-image: radial-gradient(ellipse 82% 64% at 50% 26%, #000 8%, rgba(0, 0, 0, 0.72) 48%, transparent 88%);
    -webkit-mask-image: radial-gradient(ellipse 82% 64% at 50% 26%, #000 8%, rgba(0, 0, 0, 0.72) 48%, transparent 88%);
    pointer-events: none;
}

.guest-landing::after {
    content: '';
    position: fixed;
    z-index: 0;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(4, 6, 9, 0.06), transparent 22%, transparent 72%, rgba(2, 4, 6, 0.3)),
        radial-gradient(ellipse 74% 62% at 50% 38%, transparent 38%, rgba(1, 3, 5, 0.26) 100%);
    pointer-events: none;
}

.guest-landing > header,
.guest-landing > main,
.guest-landing > footer {
    position: relative;
    z-index: 1;
}

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

.guest-landing button,
.guest-landing textarea,
.guest-landing a {
    font: inherit;
}

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

.landing-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 80;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    min-height: 64px;
    padding: 8px clamp(16px, 3vw, 52px);
    border-bottom: 1px solid transparent;
    background: linear-gradient(180deg, rgba(8, 10, 16, 0.9), rgba(8, 11, 15, 0.62));
    backdrop-filter: blur(18px) saturate(130%);
    -webkit-backdrop-filter: blur(18px) saturate(130%);
}

.landing-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    width: max-content;
    color: #fff;
    text-decoration: none;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.landing-brand small {
    margin-left: 1px;
    padding: 3px 7px;
    border: 1px solid rgba(102, 224, 184, 0.24);
    border-radius: 999px;
    color: var(--landing-green);
    background: rgba(102, 224, 184, 0.08);
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.landing-brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border: 1px solid rgba(102, 224, 184, 0.45);
    border-radius: 11px;
    color: #07100d;
    background: linear-gradient(145deg, #9af0d2, #48d3a5);
    box-shadow: 0 8px 28px rgba(72, 211, 165, 0.18);
}

.landing-brand-mark svg {
    width: 19px;
    height: 19px;
    stroke-width: 2.2;
}

.landing-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px;
    border: 1px solid rgba(255, 255, 255, 0.075);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.035);
}

.landing-nav a {
    padding: 8px 14px;
    border-radius: 999px;
    color: #aeb3bb;
    text-decoration: none;
    font-size: 12px;
    transition: color 0.2s ease, background 0.2s ease;
}

.landing-nav a:hover,
.landing-nav a:focus-visible {
    color: #fff;
    background: rgba(255, 255, 255, 0.07);
    outline: none;
}

.landing-header-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

.landing-header-actions .language-trigger {
    min-height: 42px;
    padding: 0 11px;
    border: 1px solid rgba(135, 230, 198, .23);
    border-radius: 10px;
    color: #d8f5eb;
    background: rgba(83, 184, 151, .08);
    cursor: pointer;
    transition: border-color .2s ease, background .2s ease, color .2s ease;
}

.landing-header-actions .language-trigger:hover,
.landing-header-actions .language-trigger:focus-visible {
    border-color: rgba(135, 230, 198, .5);
    color: #fff;
    background: rgba(83, 184, 151, .16);
    outline: none;
}

.landing-link-btn,
.landing-primary-btn,
.landing-secondary-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 42px;
    padding: 0 18px;
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.landing-link-btn {
    border: 1px solid transparent;
    color: #c7cbd1;
    background: transparent;
}

.landing-link-btn:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.06);
}

.landing-primary-btn {
    border: 1px solid #dff8ef;
    color: #0b1713;
    background: linear-gradient(180deg, #f4fffb, #c9f2e4);
    box-shadow: 0 10px 28px rgba(73, 211, 166, 0.12);
    font-size: 13px;
    font-weight: 700;
}

.landing-primary-btn:hover {
    transform: translateY(-2px);
    background: #fff;
    box-shadow: 0 14px 36px rgba(73, 211, 166, 0.22);
}

.landing-secondary-btn {
    border: 1px solid rgba(255, 255, 255, 0.14);
    color: #d8dbe0;
    background: rgba(255, 255, 255, 0.055);
}

.landing-secondary-btn:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.25);
    color: #fff;
    background: rgba(255, 255, 255, 0.09);
}

.landing-primary-btn svg,
.landing-secondary-btn svg {
    width: 16px;
    height: 16px;
}

.guest-landing main {
    display: block;
}

.landing-hero {
    position: relative;
    width: min(1520px, calc(100% - 32px));
    margin: 0 auto;
    padding: 104px 0 48px;
    text-align: center;
}

.landing-hero::before {
    content: '';
    position: absolute;
    z-index: 0;
    top: 54px;
    left: 50%;
    width: min(880px, 88vw);
    height: 410px;
    transform: translateX(-50%);
    opacity: 0.55;
    background-image: radial-gradient(circle, rgba(255, 255, 255, 0.22) 1px, transparent 1.2px);
    background-size: 22px 22px;
    mask-image: radial-gradient(ellipse, #000 0%, rgba(0, 0, 0, 0.72) 40%, transparent 76%);
    pointer-events: none;
}

.landing-hero-glow {
    position: absolute;
    z-index: 0;
    border-radius: 999px;
    filter: blur(90px);
    pointer-events: none;
}

.landing-hero-glow-one {
    top: 135px;
    left: 16%;
    width: 280px;
    height: 220px;
    background: rgba(105, 87, 226, 0.25);
}

.landing-hero-glow-two {
    top: 230px;
    right: 13%;
    width: 310px;
    height: 240px;
    background: rgba(43, 210, 157, 0.21);
}

.landing-hero-copy,
.landing-composer,
.landing-hero-actions,
.landing-hero-note,
.landing-canvas-demo {
    position: relative;
    z-index: 2;
}

.landing-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    min-height: 30px;
    padding: 0 11px;
    border: 1px solid rgba(102, 224, 184, 0.22);
    border-radius: 999px;
    color: #a7e9d2;
    background: rgba(102, 224, 184, 0.07);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.04em;
}

.landing-eyebrow svg {
    width: 14px;
    height: 14px;
}

.landing-hero h1 {
    max-width: 1180px;
    margin: 18px auto 12px;
    color: #f8f9fa;
    font-size: clamp(40px, 3.35vw, 60px);
    font-weight: 670;
    line-height: 1.05;
    letter-spacing: -0.035em;
    text-wrap: balance;
}

.landing-hero h1 em {
    color: transparent;
    background: linear-gradient(100deg, #ffffff 8%, #9ce8cf 48%, #a5a2fa 90%);
    background-clip: text;
    -webkit-background-clip: text;
    font-style: normal;
}

.landing-hero-copy > p {
    width: min(720px, 92%);
    margin: 0 auto;
    color: #a3a9b2;
    font-size: clamp(14px, 1.05vw, 16px);
    line-height: 1.58;
}

.landing-composer {
    isolation: isolate;
    width: min(900px, 96%);
    margin: 24px auto 0;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 18px;
    background:
        linear-gradient(135deg, rgba(38, 39, 48, 0.88), rgba(20, 27, 29, 0.9)),
        rgba(22, 24, 29, 0.9);
    box-shadow: 0 26px 80px rgba(0, 0, 0, 0.38), inset 0 1px rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(20px) saturate(120%);
    -webkit-backdrop-filter: blur(20px) saturate(120%);
    text-align: left;
    transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.landing-composer::before {
    position: absolute;
    z-index: -2;
    inset: -1px;
    padding: 1px;
    border-radius: inherit;
    background: conic-gradient(from var(--composer-angle, 0deg), transparent 0 20%, rgba(100,224,184,.7) 31%, rgba(150,139,255,.52) 43%, transparent 56% 100%);
    content: '';
    opacity: .38;
    pointer-events: none;
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    animation: landingComposerOrbit 8s linear infinite;
}

.landing-composer::after {
    position: absolute;
    z-index: -1;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(520px 120px at var(--composer-glow-x, 18%) -22%, rgba(86,220,175,.09), transparent 68%);
    content: '';
    pointer-events: none;
    animation: landingComposerGlow 7s ease-in-out infinite alternate;
}

@property --composer-angle {
    syntax: '<angle>';
    initial-value: 0deg;
    inherits: false;
}

@keyframes landingComposerOrbit { to { --composer-angle: 360deg; } }
@keyframes landingComposerGlow {
    from { --composer-glow-x: 14%; opacity: .7; }
    to { --composer-glow-x: 86%; opacity: 1; }
}

.landing-composer:focus-within {
    border-color: rgba(102, 224, 184, 0.52);
    box-shadow: 0 0 0 3px rgba(102, 224, 184, 0.08), 0 30px 90px rgba(0, 0, 0, 0.48);
    transform: translateY(-2px);
}

.landing-composer:focus-within::before { opacity: .7; }

.landing-composer textarea {
    display: block;
    width: 100%;
    min-height: 92px;
    resize: vertical;
    padding: 17px 20px 6px;
    border: 0;
    outline: none;
    color: #f4f5f6;
    background: transparent;
    font-size: 15px;
    line-height: 1.65;
}

.landing-composer textarea::placeholder {
    color: #777e88;
    transition: color .3s ease, opacity .3s ease;
}

.landing-composer.is-cycling textarea::placeholder { color: #a6adb7; }

.landing-prompt-hint {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    margin: 0 22px;
    color: #6f7781;
    font-size: 10px;
    line-height: 1.4;
    transition: opacity .2s ease, transform .2s ease;
}

.landing-prompt-hint i {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #69dcb6;
    box-shadow: 0 0 0 4px rgba(105,220,182,.08);
    animation: landingHintPulse 1.8s ease-in-out infinite;
}

.landing-composer.has-value .landing-prompt-hint { opacity: 0; transform: translateY(-3px); pointer-events: none; }
@keyframes landingHintPulse { 50% { box-shadow: 0 0 0 7px rgba(105,220,182,0); } }

.landing-composer-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 8px 10px 10px;
}

.landing-input-tools {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.landing-input-tools button {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 32px;
    padding: 0 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: #9fa5ae;
    background: rgba(255, 255, 255, 0.035);
    cursor: pointer;
    font-size: 11px;
}

.landing-input-tools button:hover {
    border-color: rgba(255, 255, 255, 0.2);
    color: #fff;
    background: rgba(255, 255, 255, 0.07);
}

.landing-input-tools .landing-canvas-entry {
    border-color: rgba(101, 224, 183, .25);
    color: #aeeed9;
    background: rgba(56, 181, 140, .09);
}

.landing-input-tools .landing-canvas-entry:hover {
    border-color: rgba(101, 224, 183, .48);
    color: #eafff8;
    background: rgba(56, 181, 140, .16);
    box-shadow: 0 0 18px rgba(56,181,140,.08);
}

.landing-input-tools svg {
    width: 14px;
    height: 14px;
}

.landing-submit {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border: 0;
    border-radius: 12px;
    color: #07110d;
    background: linear-gradient(145deg, #eafff7, #72dfba);
    cursor: pointer;
    box-shadow: 0 8px 20px rgba(63, 204, 156, 0.18);
    transition: transform 0.2s ease, filter 0.2s ease;
}

.landing-submit:hover {
    transform: translateY(-2px) scale(1.02);
    filter: brightness(1.08);
}

.landing-submit svg {
    width: 20px;
    height: 20px;
    stroke-width: 2.3;
}

.landing-hero-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 14px;
}

.landing-hero-actions .landing-primary-btn,
.landing-hero-actions .landing-secondary-btn {
    min-height: 42px;
    padding-inline: 20px;
}

.landing-hero-note {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin: 9px 0 0;
    color: #747b84;
    font-size: 10px;
}

.landing-hero-note svg {
    width: 13px;
    height: 13px;
}

.landing-canvas-demo {
    width: 100%;
    height: clamp(500px, 38vw, 560px);
    margin: 40px auto 0;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.13);
    border-radius: 20px;
    background: #0c0e10;
    box-shadow: 0 42px 120px rgba(0, 0, 0, 0.55), inset 0 1px rgba(255, 255, 255, 0.045);
    text-align: left;
}

.landing-demo-grid {
    position: absolute;
    inset: 50px 0 0;
    background-image: radial-gradient(circle, rgba(255, 255, 255, 0.12) 1px, transparent 1.25px);
    background-size: 22px 22px;
    opacity: 0.55;
}

.landing-demo-toolbar {
    position: relative;
    z-index: 5;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 50px;
    padding: 0 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.09);
    color: #dfe2e6;
    background: #17191c;
    font-size: 12px;
}

.landing-demo-toolbar > span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.landing-demo-toolbar svg {
    width: 15px;
    height: 15px;
    color: var(--landing-green);
}

.landing-demo-status {
    color: #777e87;
    font-size: 10px;
}

.landing-demo-status b {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--landing-green-strong);
    box-shadow: 0 0 0 4px rgba(40, 200, 150, 0.1);
}

.landing-demo-lines {
    position: absolute;
    z-index: 1;
    inset: 56px 0 0;
    width: 100%;
    height: calc(100% - 56px);
    pointer-events: none;
}

.landing-demo-lines path {
    fill: none;
    stroke: rgba(102, 224, 184, 0.5);
    stroke-width: 2;
    stroke-dasharray: 6 7;
    vector-effect: non-scaling-stroke;
    animation: landingLineMove 12s linear infinite;
}

@keyframes landingLineMove {
    to { stroke-dashoffset: -130; }
}

.landing-demo-node {
    position: absolute;
    z-index: 3;
    width: 240px;
    min-height: 104px;
    padding: 14px 16px;
    border: 1px solid rgba(255, 255, 255, 0.13);
    border-radius: 14px;
    color: #f4f5f6;
    background: linear-gradient(145deg, rgba(35, 38, 42, 0.98), rgba(24, 26, 29, 0.98));
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35), inset 0 1px rgba(255, 255, 255, 0.04);
}

.landing-demo-node::before {
    content: '';
    position: absolute;
    inset: 0 auto 0 0;
    width: 2px;
    border-radius: 14px 0 0 14px;
    background: var(--landing-green);
    opacity: 0.7;
}

.landing-demo-node small {
    display: block;
    margin: 0 0 7px 40px;
    color: #777f89;
    font-size: 9px;
    letter-spacing: 0.04em;
}

.landing-demo-node strong {
    display: block;
    margin-left: 40px;
    font-size: 13px;
    font-weight: 650;
}

.landing-demo-node p {
    margin: 8px 0 0 40px;
    color: #9299a2;
    font-size: 9px;
}

.landing-node-icon {
    position: absolute;
    top: 15px;
    left: 15px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 9px;
}

.landing-node-icon svg { width: 15px; height: 15px; }
.landing-node-icon.coral { color: #ffb5a7; background: rgba(255, 128, 108, 0.13); }
.landing-node-icon.violet { color: #b9b7ff; background: rgba(139, 135, 255, 0.14); }
.landing-node-icon.cyan { color: #91dcec; background: rgba(73, 188, 212, 0.13); }
.landing-node-icon.mint { color: #83e9c7; background: rgba(63, 204, 156, 0.13); }

.landing-node-port {
    position: absolute;
    top: calc(50% - 8px);
    width: 16px;
    height: 16px;
    border: 3px solid #1b1e21;
    border-radius: 50%;
    background: #68ddb8;
    box-shadow: 0 0 0 1px rgba(104, 221, 184, 0.45);
}

.landing-node-port.port-left { left: -9px; }
.landing-node-port.port-right { right: -9px; }
.landing-demo-node.node-idea { top: 172px; left: 22px; }
.landing-demo-node.node-image { top: 88px; left: calc(50% - 120px); }
.landing-demo-node.node-audio { top: 256px; left: calc(50% - 120px); }
.landing-demo-node.node-video { top: 172px; right: 22px; }

/* v1.16 · 首页案例轮播：主视觉下方展示真实工作流案例。 */
.landing-showcase-slide {
    position: absolute;
    inset: 50px 0 0;
    z-index: 2;
    opacity: 0;
    visibility: hidden;
    transform: translateX(20px);
    transition: opacity .42s ease, transform .42s ease, visibility .42s;
}

.landing-showcase-slide.is-active {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.landing-showcase-slide .landing-demo-lines {
    inset: 0;
    height: 100%;
}

.landing-showcase-image {
    margin: 0;
    overflow: hidden;
    background: #0a0c0e;
}

.landing-showcase-image img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
    object-position: center;
}

/* v1.81 · 桌面端压低案例框并让封面无黑边铺满；窄屏继续完整显示。 */
@media (min-width: 961px) {
    .landing-showcase-image img { object-fit: cover; object-position: center 48%; }
    .landing-demo-node.node-idea,
    .landing-demo-node.node-video { top: calc(50% - 52px); }
    .landing-demo-node.node-image { top: calc(50% - 124px); }
    .landing-demo-node.node-audio { top: calc(50% + 20px); }
}
.landing-showcase-image img {
    object-position: center;
    background: #090c0e;
}

.landing-showcase-image::after {
    content: '';
    position: absolute;
    inset: auto 0 0;
    height: 34%;
    background: linear-gradient(transparent, rgba(5, 7, 8, .88));
    pointer-events: none;
}

.landing-showcase-image figcaption {
    position: absolute;
    z-index: 3;
    left: 24px;
    bottom: 22px;
    display: flex;
    align-items: baseline;
    gap: 12px;
    color: #fff;
}

.landing-showcase-image figcaption b { font-size: 18px; }
.landing-showcase-image figcaption span { color: #aeb5bd; font-size: 12px; }

.landing-showcase-controls {
    position: absolute;
    z-index: 8;
    left: 50%;
    bottom: 13px;
    display: flex;
    gap: 7px;
    transform: translateX(-50%);
}

.landing-showcase-controls button {
    width: 22px;
    height: 4px;
    padding: 0;
    border: 0;
    border-radius: 999px;
    cursor: pointer;
    background: rgba(255,255,255,.22);
    transition: width .2s ease, background .2s ease;
}

.landing-showcase-controls button.is-active {
    width: 38px;
    background: var(--landing-green);
}

@media (prefers-reduced-motion: reduce) {
    .landing-showcase-slide { transition: none; }
    .landing-composer::before,
    .landing-composer::after,
    .landing-prompt-hint i { animation: none; }
}

@media (max-width: 680px) {
    .landing-header { min-height: 60px; padding: 8px 14px; }
    .landing-brand { font-size: 15px; }
    .landing-brand-mark { width: 30px; height: 30px; border-radius: 9px; }
    .landing-nav { display: none; }
    .landing-header-actions .landing-link-btn,
    .landing-header-actions .landing-primary-btn { min-height: 36px; padding-inline: 12px; font-size: 12px; }
    .landing-hero { padding: 92px 14px 56px; }
    .landing-hero-copy h1 { max-width: 11em; margin-inline: auto; font-size: clamp(38px, 12vw, 56px); line-height: 1.05; }
    .landing-hero-copy p { max-width: 32em; font-size: 14px; line-height: 1.65; }
    .landing-composer { border-radius: 16px; }
    .landing-composer textarea { min-height: 118px; padding: 16px 16px 6px; font-size: 14px; }
    .landing-prompt-hint { margin-inline: 16px; }
    .landing-input-tools button span { display: none; }
    .landing-input-tools button { width: 36px; padding: 0; justify-content: center; }
    .landing-hero-actions { flex-direction: column; align-items: stretch; width: min(330px, 100%); margin-inline: auto; }
    .landing-canvas-demo { height: auto; aspect-ratio: 16 / 10; margin-top: 40px; border-radius: 16px; }
    .landing-demo-toolbar { height: 46px; padding-inline: 12px; }
    .landing-showcase-slide { inset-top: 46px; inset: 46px 0 0; }
    .landing-demo-node { width: calc(50% - 18px); min-height: 88px; padding: 12px; }
    .landing-demo-node.node-idea, .landing-demo-node.node-audio { left: 9px; }
    .landing-demo-node.node-image, .landing-demo-node.node-video { right: 9px; left: auto; }
    .landing-demo-node.node-idea, .landing-demo-node.node-image { top: 18px; }
    .landing-demo-node.node-audio, .landing-demo-node.node-video { top: auto; bottom: 22px; }
    .landing-demo-node small, .landing-demo-node strong, .landing-demo-node p { margin-left: 32px; }
    .landing-demo-node p { display: none; }
    .landing-showcase-image figcaption { left: 14px; bottom: 16px; gap: 7px; flex-direction: column; }
    .landing-showcase-image figcaption b { font-size: 15px; }
    .landing-showcase-image figcaption span { font-size: 10px; }
    .landing-model-strip, .landing-section, .landing-final-cta { width: calc(100% - 28px); }
}

.landing-model-strip {
    display: flex;
    align-items: center;
    gap: 30px;
    width: min(1520px, calc(100% - 32px));
    margin: 0 auto;
    padding: 18px 0 56px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.085);
    color: #6e757e;
}

.landing-model-strip > span {
    flex: 0 0 auto;
    color: #717781;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.landing-model-strip > div {
    display: flex;
    flex: 1;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 14px 22px;
}

.landing-model-strip b {
    color: #9299a3;
    font-size: 12px;
    font-weight: 550;
}

.landing-section {
    width: min(1520px, calc(100% - 32px));
    margin: 0 auto;
    padding: 80px 0;
}

.landing-section-heading {
    max-width: 680px;
    margin-bottom: 34px;
}

.landing-section-heading > span {
    display: block;
    margin-bottom: 13px;
    color: #6ce0ba;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.14em;
}

.landing-section-heading h2,
.landing-final-cta h2 {
    margin: 0;
    color: #f6f7f8;
    font-size: clamp(28px, 2.6vw, 40px);
    font-weight: 650;
    line-height: 1.2;
    letter-spacing: -0.035em;
}

.landing-section-heading p {
    margin: 14px 0 0;
    color: #8f969f;
    font-size: 14px;
    line-height: 1.7;
}

.landing-capability-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
    gap: 16px;
}

.landing-capability-card {
    position: relative;
    display: flex;
    flex-direction: column;
    grid-column: auto;
    aspect-ratio: 16 / 9;
    min-width: 0;
    min-height: 0;
    overflow: hidden;
    padding: clamp(22px, 1.35vw, 26px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    background: #111315;
    transition: transform 0.25s ease, border-color 0.25s ease;
}

.landing-capability-card.feature-wide {
    grid-column: auto;
}

.landing-capability-card::before,
.landing-capability-card::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}

.landing-capability-card::before {
    top: -100px;
    right: -75px;
    width: 240px;
    height: 240px;
    filter: blur(28px);
    opacity: 0.27;
}

.landing-capability-card::after {
    inset: auto 0 0;
    height: 44%;
    border-radius: 0;
    background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.018));
}

.landing-capability-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, 0.18);
}

.landing-capability-card.card-indigo::before { background: #6d6ce8; }
.landing-capability-card.card-rose::before { background: #df5f96; }
.landing-capability-card.card-amber::before { background: #df9b4d; }
.landing-capability-card.card-mint::before { background: #36c999; }
.landing-capability-card.card-slate::before { background: #6a93bb; }
.landing-capability-card.card-blue::before { background: #4d83df; }

.landing-card-icon {
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    margin-bottom: clamp(16px, 1.1vw, 20px);
    border: 1px solid rgba(255, 255, 255, 0.11);
    border-radius: 13px;
    color: #ecf0f3;
    background: rgba(255, 255, 255, 0.06);
}

.landing-card-icon svg { width: 22px; height: 22px; }

.landing-capability-card > span,
.landing-capability-card h3,
.landing-capability-card p,
.landing-mini-flow,
.landing-timeline-art,
.landing-asset-art {
    position: relative;
    z-index: 1;
}

.landing-capability-card > span {
    display: block;
    margin-bottom: 7px;
    color: #7f8791;
    font-size: 11px;
}

.landing-capability-card h3 {
    margin: 0;
    color: #f3f5f6;
    font-size: clamp(16px, 0.95vw, 18px);
    font-weight: 630;
    letter-spacing: -0.025em;
}

.landing-capability-card p {
    max-width: 470px;
    margin: 9px 0 0;
    color: #8e959e;
    font-size: 12px;
    line-height: 1.5;
}

.landing-mini-flow {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: auto;
    padding-top: 16px;
}

.landing-mini-flow b {
    padding: 6px 9px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 7px;
    color: #b7bdc5;
    background: rgba(255, 255, 255, 0.045);
    font-size: 9px;
    font-weight: 600;
}

.landing-mini-flow i {
    flex: 1;
    height: 1px;
    min-width: 10px;
    background: linear-gradient(90deg, rgba(112, 222, 187, 0.15), rgba(112, 222, 187, 0.72));
}

.landing-timeline-art {
    display: flex;
    align-items: center;
    gap: 5px;
    height: 48px;
    margin-top: auto;
    padding: 7px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 9px;
    background: rgba(0, 0, 0, 0.2);
}

.landing-asset-art {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
    margin-top: auto;
    padding-top: 15px;
}

.landing-asset-art b {
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 0;
    padding: 8px 9px;
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 8px;
    color: #aeb6c1;
    background: rgba(255, 255, 255, 0.04);
    font-size: 9px;
    font-weight: 600;
}

.landing-asset-art svg {
    width: 13px;
    height: 13px;
    color: #87b5ff;
}

.landing-timeline-art b {
    display: block;
    height: 100%;
    border-radius: 5px;
    background: linear-gradient(135deg, #304e68, #243747);
}

.landing-timeline-art b:nth-of-type(1) { width: 34%; }
.landing-timeline-art b:nth-of-type(2) { width: 22%; }
.landing-timeline-art b:nth-of-type(3) { width: 42%; }
.landing-timeline-art i {
    position: absolute;
    top: 19px;
    bottom: 0;
    left: 47%;
    z-index: 2;
    width: 2px;
    background: #67e0b8;
    box-shadow: 0 0 12px rgba(103, 224, 184, 0.6);
}

.landing-timeline-art em {
    position: absolute;
    top: 16px;
    left: calc(47% - 4px);
    width: 10px;
    height: 7px;
    border-radius: 5px 5px 1px 1px;
    background: #67e0b8;
}

.landing-workflow {
    border-top: 0;
}

.landing-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.landing-steps article {
    position: relative;
    min-height: 250px;
    padding: 22px;
    border: 1px solid rgba(255, 255, 255, 0.085);
    border-radius: 17px;
    background: linear-gradient(145deg, #121416, #0d0f10);
}

.landing-steps article > b {
    display: block;
    margin-bottom: 48px;
    color: #555c65;
    font-size: 11px;
    font-weight: 650;
}

.landing-steps article svg {
    width: 25px;
    height: 25px;
    margin-bottom: 18px;
    color: #72dfbc;
}

.landing-steps h3 {
    margin: 0 0 9px;
    color: #eef0f2;
    font-size: 17px;
    font-weight: 620;
}

.landing-steps p {
    margin: 0;
    color: #858c95;
    font-size: 11px;
    line-height: 1.7;
}

.landing-final-cta {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 48px;
    width: min(1404px, calc(100% - 64px));
    margin: 12px auto 72px;
    overflow: hidden;
    padding: 42px 50px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 26px;
    background:
        radial-gradient(circle at 20% 0, rgba(106, 105, 230, 0.2), transparent 42%),
        radial-gradient(circle at 85% 100%, rgba(56, 202, 155, 0.18), transparent 46%),
        #121416;
    text-align: left;
}

.landing-final-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.28;
    background-image: radial-gradient(circle, rgba(255, 255, 255, 0.18) 1px, transparent 1.2px);
    background-size: 24px 24px;
    mask-image: radial-gradient(ellipse, #000, transparent 72%);
}

.landing-final-cta > * {
    position: relative;
    z-index: 1;
}

.landing-final-copy,
.landing-final-actions {
    position: relative;
    z-index: 1;
}

.landing-final-copy h2 {
    max-width: 760px;
    margin: 14px 0 0;
}

.landing-final-copy > p {
    margin: 11px 0 0;
    color: #939aa3;
    font-size: 14px;
}

.landing-final-actions {
    display: flex;
    justify-content: flex-end;
    gap: 9px;
}

.landing-footer {
    display: flex;
    align-items: center;
    justify-content: center;
    width: min(1404px, calc(100% - 64px));
    min-height: 108px;
    margin: 0 auto;
    border-top: 0;
    color: #676e77;
    font-size: 10px;
}

.landing-footer p { margin: 0; text-align: center; }

.landing-footer-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0 8px;
}

.landing-footer-meta a {
    color: #89929e;
    text-decoration: none;
    transition: color .18s ease;
}

.landing-footer-meta a:hover { color: #bceede; }
.landing-footer-meta i { color: #343b43; font-style: normal; }

@media (max-width: 1240px) {
    .landing-capability-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 960px) {
    .landing-header {
        grid-template-columns: 1fr auto;
    }

    .landing-nav {
        display: none;
    }

    .landing-hero {
        padding-top: 96px;
    }

    .landing-canvas-demo {
        height: 400px;
    }

    .landing-demo-node {
        width: 190px;
    }

    .landing-demo-node.node-image,
    .landing-demo-node.node-audio {
        left: calc(50% - 95px);
    }

    .landing-capability-card,
    .landing-capability-card.feature-wide {
        grid-column: auto;
    }

    .landing-steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .landing-final-cta {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 38px 34px;
    }

    .landing-final-actions {
        justify-content: flex-start;
    }
}

@media (max-width: 820px) {
    .landing-capability-grid {
        grid-template-columns: 1fr;
    }

    .landing-capability-card,
    .landing-capability-card.feature-wide {
        aspect-ratio: auto;
        min-height: 252px;
    }
}

@media (max-width: 680px) {
    .landing-header {
        min-height: 62px;
        padding: 9px 14px;
    }

    .landing-brand {
        gap: 7px;
        font-size: 14px;
    }

    .landing-brand-mark {
        width: 30px;
        height: 30px;
        border-radius: 9px;
    }

    .landing-brand small,
    .landing-link-btn {
        display: none;
    }

    .landing-register-btn {
        min-height: 36px;
        padding: 0 12px;
        font-size: 11px;
    }

    .landing-hero {
        width: min(100% - 24px, 1200px);
        padding: 84px 0 38px;
    }

    .landing-hero::before {
        top: 62px;
        height: 300px;
        background-size: 18px 18px;
    }

    .landing-hero h1 {
        margin-top: 20px;
        font-size: clamp(34px, 10.5vw, 48px);
        line-height: 1.12;
        letter-spacing: -0.035em;
    }

    .landing-hero h1 em {
        display: block;
        margin-top: 3px;
    }

    .landing-hero-copy > p {
        width: 96%;
        font-size: 14px;
        line-height: 1.68;
    }

    .landing-composer {
        width: 100%;
        margin-top: 20px;
        border-radius: 15px;
    }

    .landing-composer textarea {
        min-height: 92px;
        padding: 17px 16px 6px;
        font-size: 13px;
    }

    .landing-input-tools button {
        width: 34px;
        padding: 0;
        justify-content: center;
    }

    .landing-input-tools button span {
        display: none;
    }

    .landing-hero-actions {
        align-items: stretch;
    }

    .landing-hero-actions .landing-primary-btn,
    .landing-hero-actions .landing-secondary-btn {
        flex: 1;
        min-height: 44px;
        padding-inline: 11px;
        font-size: 11px;
    }

    .landing-hero-note {
        align-items: flex-start;
        padding-inline: 12px;
        line-height: 1.55;
        text-align: left;
    }

    .landing-canvas-demo {
        height: 400px;
        margin-top: 34px;
        border-radius: 17px;
    }

    .landing-demo-lines {
        display: none;
    }

    .landing-demo-node {
        width: calc(50% - 24px);
        min-height: 120px;
        padding: 13px;
    }

    .landing-demo-node small,
    .landing-demo-node strong,
    .landing-demo-node p {
        margin-left: 0;
    }

    .landing-demo-node small { margin-top: 40px; }
    .landing-demo-node strong { font-size: 11px; }
    .landing-demo-node p { font-size: 8px; }
    .landing-node-port { display: none; }
    .landing-demo-node.node-idea { top: 76px; left: 14px; }
    .landing-demo-node.node-image { top: 76px; right: 14px; left: auto; }
    .landing-demo-node.node-audio { top: 240px; left: 14px; }
    .landing-demo-node.node-video { top: 240px; right: 14px; }

    .landing-model-strip {
        display: block;
        width: calc(100% - 28px);
        padding: 18px 0 52px;
    }

    .landing-model-strip > span {
        display: block;
        margin-bottom: 16px;
    }

    .landing-model-strip > div {
        justify-content: flex-start;
        gap: 12px 18px;
    }

    .landing-model-strip b { font-size: 10px; }

    .landing-section {
        width: calc(100% - 28px);
        padding: 76px 0;
    }

    .landing-section-heading {
        margin-bottom: 28px;
    }

    .landing-section-heading h2,
    .landing-final-cta h2 {
        font-size: 31px;
    }

    .landing-section-heading p {
        font-size: 13px;
    }

    .landing-capability-grid {
        display: block;
    }

    .landing-capability-card {
        aspect-ratio: auto;
        min-height: 252px;
        margin-bottom: 12px;
        padding: 23px;
    }

    .landing-card-icon { margin-bottom: 30px; }
    .landing-mini-flow { gap: 4px; }
    .landing-mini-flow b { padding: 5px 6px; font-size: 8px; }

    .landing-steps {
        display: block;
    }

    .landing-steps article {
        display: grid;
        grid-template-columns: 48px 1fr;
        min-height: 0;
        margin-bottom: 10px;
        padding: 20px;
    }

    .landing-steps article > b {
        margin: 3px 0 0;
    }

    .landing-steps article svg {
        margin-bottom: 11px;
    }

    .landing-final-cta {
        width: calc(100% - 28px);
        margin-bottom: 60px;
        padding: 32px 20px;
        border-radius: 20px;
    }

    .landing-final-actions {
        flex-direction: column;
    }

    .landing-final-cta .landing-primary-btn,
    .landing-final-cta .landing-secondary-btn {
        width: 100%;
    }

    .landing-footer {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 9px;
        width: calc(100% - 28px);
        min-height: 150px;
    }

    .landing-footer p { text-align: center; }
    .landing-footer-meta { gap: 7px 9px; line-height: 1.55; }
    .landing-footer-meta i { display: none; }
}

@media (max-width: 440px) {
    .landing-header-actions { gap: 6px; }
    .landing-register-btn { padding-inline: 10px; }
    .landing-hero { width: calc(100% - 20px); padding-top: 78px; }
    .landing-eyebrow { min-height: 27px; font-size: 10px; }
    .landing-hero h1 { font-size: clamp(32px, 10.4vw, 43px); }
    .landing-hero-copy > p { font-size: 13px; }
    .landing-composer textarea { min-height: 96px; }
    .landing-composer-footer { padding-inline: 9px; }
    .landing-hero-actions { gap: 7px; }
    .landing-hero-actions .landing-primary-btn,
    .landing-hero-actions .landing-secondary-btn { font-size: 10px; }
    .landing-canvas-demo { height: 370px; }
    .landing-demo-node { width: calc(50% - 19px); }
    .landing-demo-node.node-idea,
    .landing-demo-node.node-audio { left: 10px; }
    .landing-demo-node.node-image,
    .landing-demo-node.node-video { right: 10px; }
}

@media (prefers-reduced-motion: reduce) {
    .guest-landing *,
    .guest-landing *::before,
    .guest-landing *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}
/* v1.81 · 窄屏优先展示完整案例封面。 */
@media (max-width: 960px) {
    .landing-showcase-image img { object-fit: contain; }
}