/* =========================================================
   Tie · 桌面便签应用官网样式
   - 纯 CSS，无外部依赖
   - 琥珀黄主题色 #f59e0b
   - 响应式：桌面 / 平板 / 移动端
   ========================================================= */

/* ---------- 设计令牌 ---------- */
:root {
    /* 主色 - 琥珀 */
    --amber-50:  #fffbeb;
    --amber-100: #fef3c7;
    --amber-200: #fde68a;
    --amber-300: #fcd34d;
    --amber-400: #fbbf24;
    --amber-500: #f59e0b;
    --amber-600: #d97706;
    --amber-700: #b45309;
    --amber-800: #92400e;

    /* 中性色 */
    --zinc-50:  #fafafa;
    --zinc-100: #f4f4f5;
    --zinc-200: #e4e4e7;
    --zinc-300: #d4d4d8;
    --zinc-400: #a1a1aa;
    --zinc-500: #71717a;
    --zinc-600: #52525b;
    --zinc-700: #3f3f46;
    --zinc-800: #27272a;
    --zinc-900: #18181b;

    /* 语义色 */
    --bg:          #ffffff;
    --bg-soft:     #fafaf9;
    --bg-muted:    #f5f5f4;
    --text:        var(--zinc-900);
    --text-soft:   var(--zinc-700);
    --text-muted:  var(--zinc-500);
    --border:      var(--zinc-200);
    --border-soft: #efefef;

    /* 主题色别名 */
    --primary:        var(--amber-500);
    --primary-strong: var(--amber-600);
    --primary-deep:   var(--amber-700);
    --primary-soft:   var(--amber-50);
    --primary-tint:   var(--amber-100);

    /* 阴影 */
    --shadow-xs: 0 1px 2px rgba(24, 24, 27, 0.04);
    --shadow-sm: 0 1px 3px rgba(24, 24, 27, 0.06), 0 1px 2px rgba(24, 24, 27, 0.04);
    --shadow-md: 0 4px 12px rgba(24, 24, 27, 0.06), 0 2px 4px rgba(24, 24, 27, 0.04);
    --shadow-lg: 0 12px 32px rgba(24, 24, 27, 0.08), 0 4px 12px rgba(24, 24, 27, 0.05);
    --shadow-amber: 0 12px 32px rgba(245, 158, 11, 0.22), 0 4px 12px rgba(245, 158, 11, 0.16);

    /* 圆角 */
    --r-sm: 8px;
    --r-md: 12px;
    --r-lg: 16px;
    --r-xl: 24px;
    --r-full: 999px;

    /* 字体 */
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
            "Helvetica Neue", "PingFang SC", "Hiragino Sans GB",
            "Microsoft YaHei", "微软雅黑", sans-serif;
    --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono",
                 Menlo, Consolas, monospace;

    /* 布局 */
    --container: 1200px;
    --nav-h: 64px;
}

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

* {
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-h) + 16px);
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

button {
    font: inherit;
    border: none;
    background: none;
    cursor: pointer;
    color: inherit;
}

ul {
    list-style: none;
}

/* ---------- 容器 ---------- */
.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- T 图标 (CSS 绘制) ---------- */
.t-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #ffffff;
    font-weight: 900;
    font-family: var(--font);
    line-height: 1;
    border-radius: var(--r-md);
    box-shadow:
        inset 0 -3px 0 rgba(0, 0, 0, 0.08),
        0 4px 12px rgba(245, 158, 11, 0.28);
    user-select: none;
    letter-spacing: 0;
    position: relative;
    /* 默认尺寸 56x56 */
    width: 56px;
    height: 56px;
    font-size: 36px;
}

.t-icon--sm {
    width: 32px;
    height: 32px;
    font-size: 20px;
    border-radius: var(--r-sm);
    box-shadow:
        inset 0 -2px 0 rgba(0, 0, 0, 0.08),
        0 2px 6px rgba(245, 158, 11, 0.24);
}

.t-icon--md {
    width: 64px;
    height: 64px;
    font-size: 40px;
    border-radius: var(--r-md);
}

.t-icon--xl {
    width: 96px;
    height: 96px;
    font-size: 64px;
    border-radius: var(--r-lg);
    box-shadow:
        inset 0 -6px 0 rgba(0, 0, 0, 0.1),
        0 24px 60px rgba(245, 158, 11, 0.35),
        0 8px 20px rgba(245, 158, 11, 0.25);
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 22px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--r-full);
    transition: transform 0.18s ease, box-shadow 0.18s ease,
                background-color 0.18s ease, color 0.18s ease,
                border-color 0.18s ease;
    white-space: nowrap;
    border: 1.5px solid transparent;
    cursor: pointer;
    line-height: 1.2;
}

.btn__icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.btn--primary {
    background: var(--primary);
    color: #ffffff;
    box-shadow: var(--shadow-amber);
}

.btn--primary:hover {
    background: var(--primary-strong);
    transform: translateY(-2px);
    box-shadow: 0 16px 40px rgba(245, 158, 11, 0.32),
                0 6px 14px rgba(245, 158, 11, 0.22);
}

.btn--primary:active {
    transform: translateY(0);
}

.btn--ghost {
    background: rgba(255, 255, 255, 0.6);
    color: var(--text);
    border-color: var(--border);
    backdrop-filter: blur(6px);
}

.btn--ghost:hover {
    border-color: var(--primary);
    color: var(--primary-strong);
    background: var(--primary-soft);
    transform: translateY(-2px);
}

.btn--lg {
    padding: 14px 28px;
    font-size: 16px;
}

.btn--lg .btn__icon {
    width: 20px;
    height: 20px;
}

/* ---------- 顶部导航 ---------- */
.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.78);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid var(--border-soft);
}

.nav__inner {
    height: var(--nav-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.nav__brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 18px;
    color: var(--text);
    letter-spacing: -0.01em;
}

.nav__brand-name {
    line-height: 1;
}

.nav__links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav__links a {
    padding: 8px 14px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-soft);
    border-radius: var(--r-full);
    transition: color 0.15s ease, background-color 0.15s ease;
}

.nav__links a:hover {
    color: var(--text);
    background: var(--zinc-100);
}

.nav__links a.nav__cta {
    background: var(--primary);
    color: #ffffff;
    margin-left: 8px;
    padding: 8px 18px;
}

.nav__links a.nav__cta:hover {
    background: var(--primary-strong);
    color: #ffffff;
}

.lang-btn {
    background: none;
    border: 1px solid rgba(255,255,255,0.2);
    color: var(--sidebar-text, #94a3b8);
    padding: 2px 10px;
    border-radius: 4px;
    font-size: 12px;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.12s;
}
.lang-btn:hover {
    background: rgba(255,255,255,0.08);
    color: #e2e8f0;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    border-radius: var(--r-sm);
}

.nav__toggle span {
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.2s ease;
}

.nav__toggle.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav__toggle.is-open span:nth-child(2) {
    opacity: 0;
}

.nav__toggle.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
    position: relative;
    padding: 96px 0 120px;
    overflow: hidden;
    isolation: isolate;
}

.hero__bg {
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(ellipse 80% 60% at 50% 0%, var(--amber-50) 0%, transparent 70%),
        linear-gradient(180deg, #ffffff 0%, var(--bg-soft) 100%);
}

.hero__glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.55;
    z-index: -1;
}

.hero__glow--1 {
    width: 520px;
    height: 520px;
    background: radial-gradient(circle, var(--amber-300) 0%, transparent 70%);
    top: -120px;
    left: -100px;
}

.hero__glow--2 {
    width: 440px;
    height: 440px;
    background: radial-gradient(circle, var(--amber-200) 0%, transparent 70%);
    top: -60px;
    right: -80px;
}

.hero__grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(245, 158, 11, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(245, 158, 11, 0.06) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 60% 50% at 50% 30%, #000 0%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 30%, #000 0%, transparent 75%);
    z-index: -1;
}

.hero__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 20px;
}

.hero__icon-wrap {
    position: relative;
    margin-bottom: 8px;
}

.hero__icon-pulse {
    position: absolute;
    inset: -8px;
    border-radius: var(--r-lg);
    border: 2px solid var(--primary);
    opacity: 0;
    animation: pulse 2.4s ease-out infinite;
    pointer-events: none;
}

@keyframes pulse {
    0%   { transform: scale(0.95); opacity: 0.5; }
    70%  { transform: scale(1.25); opacity: 0; }
    100% { transform: scale(1.25); opacity: 0; }
}

.hero__title {
    font-size: clamp(56px, 10vw, 96px);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 1;
    color: var(--text);
}

.hero__title-dot {
    color: var(--primary);
}

.hero__tagline {
    font-size: clamp(20px, 3vw, 26px);
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.01em;
    margin-top: 4px;
}

.hero__subtitle {
    max-width: 720px;
    font-size: 16px;
    color: var(--text-muted);
    line-height: 1.7;
    margin-top: 4px;
}

.hero__actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 16px;
}

.hero__meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin-top: 12px;
    font-size: 13px;
    color: var(--text-muted);
}

.hero__meta-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.hero__meta-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
}

.hero__scroll {
    position: absolute;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero__scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, transparent, var(--primary) 50%, transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0%, 100% { transform: scaleY(0.6); opacity: 0.5; }
    50%      { transform: scaleY(1); opacity: 1; }
}

/* ---------- 通用 Section ---------- */
.section {
    padding: 96px 0;
}

.section--alt {
    background: var(--bg-soft);
    border-top: 1px solid var(--border-soft);
    border-bottom: 1px solid var(--border-soft);
}

.section--cta {
    padding: 80px 0;
    background:
        radial-gradient(ellipse 70% 50% at 50% 0%, var(--amber-50) 0%, transparent 70%),
        var(--bg);
}

.section__head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 56px;
}

.section__eyebrow {
    display: inline-block;
    padding: 4px 14px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--primary-strong);
    background: var(--primary-soft);
    border: 1px solid var(--amber-200);
    border-radius: var(--r-full);
    margin-bottom: 16px;
}

.section__title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text);
    line-height: 1.2;
}

.section__desc {
    margin-top: 14px;
    font-size: 16px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ---------- 功能卡片 ---------- */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.card {
    position: relative;
    padding: 28px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    transition: transform 0.25s ease, box-shadow 0.25s ease,
                border-color 0.25s ease;
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--amber-300), var(--amber-500), var(--amber-600));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--amber-200);
    box-shadow: var(--shadow-lg);
}

.card:hover::before {
    transform: scaleX(1);
}

.card__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--primary-soft);
    color: var(--primary-strong);
    border-radius: var(--r-md);
    margin-bottom: 18px;
    transition: transform 0.25s ease, background-color 0.25s ease,
                color 0.25s ease;
}

.card__icon svg {
    width: 24px;
    height: 24px;
}

.card:hover .card__icon {
    background: var(--primary);
    color: #ffffff;
    transform: rotate(-6deg) scale(1.08);
}

.card__title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.01em;
    margin-bottom: 8px;
}

.card__desc {
    font-size: 14.5px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ---------- 特性区 ---------- */
.highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.highlight {
    position: relative;
    padding: 36px 28px 32px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--r-xl);
    transition: transform 0.25s ease, box-shadow 0.25s ease,
                border-color 0.25s ease;
    overflow: hidden;
}

.highlight::after {
    content: "";
    position: absolute;
    right: -60px;
    top: -60px;
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, var(--amber-100) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.highlight:hover {
    transform: translateY(-4px);
    border-color: var(--amber-200);
    box-shadow: var(--shadow-lg);
}

.highlight:hover::after {
    opacity: 1;
}

.highlight__num {
    position: absolute;
    top: 24px;
    right: 28px;
    font-size: 48px;
    font-weight: 900;
    color: var(--zinc-100);
    line-height: 1;
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.04em;
    z-index: 0;
}

.highlight__icon {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--amber-400), var(--amber-600));
    color: #ffffff;
    border-radius: var(--r-md);
    margin-bottom: 20px;
    box-shadow: var(--shadow-amber);
    z-index: 1;
}

.highlight__icon svg {
    width: 28px;
    height: 28px;
}

.highlight__title {
    position: relative;
    font-size: 20px;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.01em;
    margin-bottom: 12px;
    z-index: 1;
}

.highlight__desc {
    position: relative;
    font-size: 14.5px;
    color: var(--text-muted);
    line-height: 1.75;
    margin-bottom: 18px;
    z-index: 1;
}

.highlight__list {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 1;
}

.highlight__list li {
    position: relative;
    padding-left: 22px;
    font-size: 14px;
    color: var(--text-soft);
    line-height: 1.6;
}

.highlight__list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    width: 14px;
    height: 8px;
    border-left: 2px solid var(--primary);
    border-bottom: 2px solid var(--primary);
    transform: rotate(-45deg);
    border-radius: 0 0 0 2px;
}

/* ---------- 截图区 ---------- */
.shots {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

/* 第一行：大图独占 */
.shot--wide {
    grid-column: 1 / -1;
}

/* 第二行：左侧高图 + 右侧2×2网格 */
.shot-row {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 20px;
    /* 控制总高度，让截图区不会太大 */
    max-height: 560px;
}

.shot-row > .shot {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.shot-row > .shot .shot__img {
    flex: 1;
    min-height: 0;
    object-fit: cover;
}

.shot-row-right {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 12px;
    overflow: hidden;
}

/* 3.png 扁图跨2列 */
.shot-row-right .shot--span-cols {
    grid-column: span 2;
}

.shot-row-right .shot {
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.shot-row-right .shot__img {
    flex: 1;
    min-height: 0;
    object-fit: cover;
}

.shot-row-right .shot__caption {
    flex-shrink: 0;
}

.shot {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    display: flex;
    flex-direction: column;
}

.shot:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.shot__canvas {
    flex: 1;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    padding: 32px 24px;
    position: relative;
}

.shot__img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
}

.shot__canvas--hero {
    min-height: 360px;
    background:
        radial-gradient(ellipse 70% 50% at 50% 30%, var(--amber-50) 0%, transparent 70%),
        linear-gradient(180deg, #ffffff 0%, var(--bg-soft) 100%);
}

.shot__canvas--calendar {
    background: linear-gradient(180deg, #ffffff 0%, var(--bg-soft) 100%);
}

.shot__canvas--ai {
    background: linear-gradient(180deg, var(--zinc-900) 0%, var(--zinc-800) 100%);
    color: #ffffff;
}

.shot__canvas--ai .shot__placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.shot__placeholder {
    font-size: 13px;
    color: var(--text-muted);
    text-align: center;
}

.shot__caption {
    padding: 12px 16px;
    font-size: 13px;
    color: var(--text-muted);
    background: var(--bg-muted);
    border-top: 1px solid var(--border-soft);
    text-align: center;
}

/* 截图占位视觉 - 日历 */
.shot__cal {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
    margin-bottom: 4px;
}

.shot__cal span {
    width: 28px;
    height: 28px;
    border-radius: var(--r-sm);
    background: var(--zinc-100);
    border: 1px solid var(--border-soft);
}

.shot__cal span.is-on {
    background: var(--primary);
    border-color: var(--primary-strong);
    box-shadow: 0 2px 6px rgba(245, 158, 11, 0.4);
}

/* 截图占位视觉 - AI 文本行 */
.shot__ai {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 80%;
    max-width: 280px;
}

.shot__ai-line {
    height: 10px;
    border-radius: var(--r-full);
    background: linear-gradient(90deg, var(--amber-400) 0%, rgba(255, 255, 255, 0.15) 100%);
    animation: aiLine 1.8s ease-in-out infinite;
}

.shot__ai-line--short { width: 50%; animation-delay: 0.2s; }
.shot__ai-line--mid   { width: 75%; animation-delay: 0.4s; }

@keyframes aiLine {
    0%, 100% { opacity: 0.4; }
    50%      { opacity: 1; }
}

/* ---------- CTA 下载区 ---------- */
.cta {
    position: relative;
}

.cta__inner {
    text-align: center;
    max-width: 640px;
    margin: 0 auto;
    padding: 56px 32px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--r-xl);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.cta__inner::before {
    content: "";
    position: absolute;
    top: -80px;
    left: 50%;
    transform: translateX(-50%);
    width: 280px;
    height: 280px;
    background: radial-gradient(circle, var(--amber-200) 0%, transparent 70%);
    opacity: 0.5;
    pointer-events: none;
}

.cta__inner > * {
    position: relative;
}

.cta__inner .t-icon {
    margin: 0 auto 20px;
}

.cta__title {
    font-size: clamp(24px, 3.5vw, 32px);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text);
    margin-bottom: 12px;
}

.cta__desc {
    color: var(--text-muted);
    font-size: 15px;
    margin-bottom: 28px;
}

.cta__actions {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta__note {
    margin-top: 24px;
    font-size: 12.5px;
    color: var(--text-muted);
}

/* ---------- Footer ---------- */
.footer {
    background: var(--bg-soft);
    border-top: 1px solid var(--border-soft);
    padding: 48px 0 24px;
}

.footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    flex-wrap: wrap;
    padding-bottom: 28px;
    border-bottom: 1px solid var(--border-soft);
}

.footer__brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer__name {
    font-weight: 800;
    font-size: 16px;
    color: var(--text);
    line-height: 1.2;
}

.footer__tagline {
    font-size: 12.5px;
    color: var(--text-muted);
    margin-top: 2px;
}

.footer__links {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
}

.footer__links a {
    font-size: 14px;
    color: var(--text-soft);
    transition: color 0.15s ease;
}

.footer__links a:hover {
    color: var(--primary-strong);
}

.footer__meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-muted);
}

.footer__version {
    font-family: var(--font-mono);
    background: var(--bg);
    border: 1px solid var(--border);
    padding: 4px 10px;
    border-radius: var(--r-sm);
    color: var(--text-soft);
    font-weight: 600;
}

.footer__dot {
    color: var(--zinc-300);
}

.footer__license {
    color: var(--text-muted);
    transition: color 0.15s ease;
}

.footer__license:hover {
    color: var(--primary-strong);
}

.footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    padding-top: 24px;
    font-size: 13px;
    color: var(--text-muted);
}

.footer__back {
    color: var(--text-soft);
    transition: color 0.15s ease;
}

.footer__back:hover {
    color: var(--primary-strong);
}

/* ---------- 滚动入场动画 ---------- */
[data-reveal] {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    transition-delay: calc(var(--reveal-delay, 0) * 90ms);
    will-change: opacity, transform;
}

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

@media (prefers-reduced-motion: reduce) {
    [data-reveal] {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
    .hero__icon-pulse,
    .hero__scroll-line,
    .shot__ai-line {
        animation: none !important;
    }
    html {
        scroll-behavior: auto;
    }
}

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
    .shots {
        grid-template-columns: 1fr;
    }
    .shot--wide {
        grid-column: auto;
    }
    .shot-row {
        grid-template-columns: 1fr;
    }
    .shot-row-right {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }
    .shot-row-right .shot--span-cols {
        grid-column: auto;
    }
    .shot-row-right .shot__img {
        height: auto;
        object-fit: contain;
    }
}

@media (max-width: 768px) {
    .nav__links {
        position: fixed;
        top: var(--nav-h);
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.96);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        flex-direction: column;
        align-items: stretch;
        padding: 16px;
        gap: 4px;
        border-bottom: 1px solid var(--border-soft);
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: transform 0.3s ease, opacity 0.3s ease, visibility 0.3s ease;
    }

    .nav__links.is-open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav__links a {
        padding: 12px 16px;
        border-radius: var(--r-sm);
    }

    .nav__links a.nav__cta {
        margin-left: 0;
        margin-top: 8px;
        text-align: center;
    }

    .nav__toggle {
        display: inline-flex;
    }

    .hero {
        padding: 64px 0 88px;
    }

    .hero__scroll {
        display: none;
    }

    .section {
        padding: 72px 0;
    }

    .section__head {
        margin-bottom: 40px;
    }

    .cards {
        grid-template-columns: 1fr;
    }

    .highlights {
        grid-template-columns: 1fr;
    }

    .footer__inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 24px;
    }

    .footer__bottom {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer__links {
        gap: 16px 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 18px;
    }

    .hero__actions .btn,
    .cta__actions .btn {
        width: 100%;
    }

    .btn {
        font-size: 14.5px;
        padding: 11px 20px;
    }

    .card {
        padding: 24px;
    }

    .highlight {
        padding: 28px 22px 24px;
    }

    .cta__inner {
        padding: 40px 20px;
    }

    .hero__meta {
        gap: 12px;
        font-size: 12px;
    }
}