/**
 * PaperFix 文稿修复平台 — 产品官网
 * 品牌色：图标蓝 #2563EB、修复绿 #22C55E
 */

:root {
    --cta: #2563eb;
    --cta-hover: #1d4ed8;
    --cta-light: #eff6ff;
    --accent-green: #22c55e;
    --ink: #0f172a;
    --muted: #64748b;
    --line: #e2e8f0;
    --canvas: #f8fafc;
    --card: #ffffff;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
        "Microsoft YaHei", sans-serif;
    --max-w: 72rem;
    --radius: 0.75rem;
    --shadow: 0 1px 3px rgba(15, 39, 68, 0.06), 0 8px 24px rgba(15, 39, 68, 0.06);
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font);
    font-size: 1rem;
    line-height: 1.65;
    color: var(--ink);
    background: var(--canvas);
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--cta);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

img,
svg {
    max-width: 100%;
    height: auto;
}

/* —— 顶栏 —— */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}

.site-header__inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 1.5rem;
    min-height: 4rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.site-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: inherit;
}

.site-brand:hover {
    text-decoration: none;
}

.site-brand__glyph,
.site-brand__logo {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.625rem;
    flex-shrink: 0;
    object-fit: cover;
}

.site-brand__glyph {
    background: linear-gradient(135deg, var(--cta), #3b82f6);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1rem;
}

.site-brand__text {
    display: flex;
    flex-direction: column;
    line-height: 1.25;
}

.site-brand__title {
    font-weight: 700;
    font-size: 1.0625rem;
}

.site-brand__sub {
    font-size: 0.75rem;
    color: var(--muted);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 1.75rem;
}

.site-nav a {
    color: var(--muted);
    font-size: 0.9375rem;
    font-weight: 500;
    text-decoration: none;
}

.site-nav a:hover,
.site-nav a.is-active {
    color: var(--cta);
}

.site-nav__cta {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1.125rem;
    background: var(--cta);
    color: #fff !important;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none !important;
    transition: background 0.15s;
}

.site-nav__cta:hover {
    background: var(--cta-hover);
}

/* —— 通用区块 —— */
.section {
    padding: 4.5rem 1.5rem;
}

.section--alt {
    background: #fff;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.section__inner {
    max-width: var(--max-w);
    margin: 0 auto;
}

.section__eyebrow {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--cta);
    margin-bottom: 0.75rem;
}

.section__title {
    margin: 0 0 1rem;
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -0.02em;
}

.section__lead {
    margin: 0;
    max-width: 42rem;
    font-size: 1.0625rem;
    color: var(--muted);
}

/* —— Hero —— */
.hero {
    padding: 4rem 1.5rem 5rem;
    background: linear-gradient(165deg, #1e3a8a 0%, #2563eb 45%, #3b82f6 100%);
    color: #fff;
    overflow: hidden;
    position: relative;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
}

.hero__inner {
    max-width: var(--max-w);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    position: relative;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.875rem;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 999px;
    font-size: 0.8125rem;
    margin-bottom: 1.25rem;
}

.hero__title {
    margin: 0 0 1.25rem;
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
}

.hero__desc {
    margin: 0 0 2rem;
    font-size: 1.125rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.88);
    max-width: 32rem;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none !important;
    transition: transform 0.12s, background 0.15s, box-shadow 0.15s;
    border: none;
    cursor: pointer;
}

.btn--primary {
    background: #fff;
    color: var(--cta);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

.btn--primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.btn--ghost {
    background: transparent;
    color: #fff;
    border: 1.5px solid rgba(255, 255, 255, 0.45);
}

.btn--ghost:hover {
    background: rgba(255, 255, 255, 0.1);
}

.hero__visual {
    display: flex;
    justify-content: center;
}

.hero-card {
    width: 100%;
    max-width: 28rem;
    background: rgba(255, 255, 255, 0.96);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.2);
    color: var(--ink);
}

.hero-card__header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--line);
    font-size: 0.875rem;
    font-weight: 600;
}

.hero-card__dot {
    width: 0.625rem;
    height: 0.625rem;
    border-radius: 50%;
    background: #22c55e;
}

.hero-card__stat {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.hero-card__stat-item {
    text-align: center;
    padding: 0.75rem 0.5rem;
    background: var(--canvas);
    border-radius: 0.5rem;
}

.hero-card__stat-num {
    display: block;
    font-size: 1.375rem;
    font-weight: 800;
    color: var(--cta);
}

.hero-card__stat-label {
    font-size: 0.75rem;
    color: var(--muted);
}

.hero-card__issues {
    list-style: none;
    margin: 0;
    padding: 0;
}

.hero-card__issues li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.5rem 0;
    font-size: 0.8125rem;
    border-bottom: 1px solid var(--line);
}

.hero-card__issues li:last-child {
    border-bottom: none;
}

.issue-tag {
    flex-shrink: 0;
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    font-size: 0.6875rem;
    font-weight: 600;
}

.issue-tag--warn {
    background: #fef3c7;
    color: #b45309;
}

.issue-tag--ok {
    background: #dcfce7;
    color: #15803d;
}

/* —— 功能卡片 —— */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 2.5rem;
}

.feature-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1.75rem;
    box-shadow: var(--shadow);
    transition: transform 0.15s, box-shadow 0.15s;
}

.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(15, 39, 68, 0.1);
}

.feature-card__icon {
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 0.625rem;
    background: var(--cta-light);
    color: var(--cta);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin: 0 0 0.5rem;
    font-size: 1.0625rem;
    font-weight: 700;
}

.feature-card p {
    margin: 0;
    font-size: 0.9375rem;
    color: var(--muted);
}

/* —— 流程步骤 —— */
.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
    margin-top: 2.5rem;
    counter-reset: step;
}

.step-card {
    position: relative;
    padding: 1.5rem 1.25rem;
    background: var(--canvas);
    border-radius: var(--radius);
    border: 1px solid var(--line);
}

.step-card::before {
    counter-increment: step;
    content: counter(step);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    background: var(--cta);
    color: #fff;
    font-weight: 700;
    font-size: 0.875rem;
    margin-bottom: 0.875rem;
}

.step-card h3 {
    margin: 0 0 0.375rem;
    font-size: 1rem;
    font-weight: 700;
}

.step-card p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--muted);
}

/* —— 场景列表 —— */
.scenario-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
    margin-top: 2.5rem;
}

.scenario-item {
    display: flex;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
}

.scenario-item__icon {
    flex-shrink: 0;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.5rem;
    background: var(--cta-light);
    color: var(--cta);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
}

.scenario-item h3 {
    margin: 0 0 0.25rem;
    font-size: 1rem;
    font-weight: 700;
}

.scenario-item p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--muted);
}

/* —— 联系区 —— */
.contact-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
    padding: 2rem;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.contact-panel dl {
    margin: 0;
    display: grid;
    gap: 1rem;
}

.contact-panel dt {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--muted);
    margin-bottom: 0.125rem;
}

.contact-panel dd {
    margin: 0;
    font-size: 0.9375rem;
}

/* —— 页脚 —— */
.site-footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 3rem 1.5rem 2rem;
}

.site-footer__inner {
    max-width: var(--max-w);
    margin: 0 auto;
}

.site-footer__top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer__brand {
    color: #f1f5f9;
    font-weight: 700;
    font-size: 1.0625rem;
    margin-bottom: 0.75rem;
}

.site-footer__desc {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.7;
    max-width: 24rem;
}

.site-footer h4 {
    margin: 0 0 1rem;
    color: #e2e8f0;
    font-size: 0.875rem;
    font-weight: 600;
}

.site-footer ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-footer li {
    margin-bottom: 0.5rem;
}

.site-footer a {
    color: #94a3b8;
    font-size: 0.875rem;
    text-decoration: none;
}

.site-footer a:hover {
    color: #e2e8f0;
}

.site-footer__bottom {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding-top: 1.5rem;
    font-size: 0.8125rem;
}

.site-footer__icp a {
    color: #94a3b8;
}

/* —— 响应式（保持 PC 可读，移动端不崩） —— */
@media (max-width: 960px) {
    .hero__inner {
        grid-template-columns: 1fr;
    }

    .hero__visual {
        order: -1;
    }

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

    .site-footer__top {
        grid-template-columns: 1fr;
    }

    .contact-panel {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .site-nav {
        display: none;
    }

    .feature-grid,
    .steps,
    .scenario-grid {
        grid-template-columns: 1fr;
    }
}