:root {
    --bg: #f6f1e8;
    --bg-accent: #fdf8ef;
    --surface: rgba(255, 252, 247, 0.78);
    --surface-strong: rgba(255, 252, 247, 0.92);
    --line: rgba(74, 56, 36, 0.12);
    --text: #2b241d;
    --muted: #6d6257;
    --muted-strong: #4b4035;
    --accent: #d96c3a;
    --accent-soft: rgba(217, 108, 58, 0.12);
    --shadow: 0 24px 80px rgba(61, 42, 20, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    background:
        radial-gradient(circle at top left, rgba(255, 255, 255, 0.92), transparent 34%),
        radial-gradient(circle at top right, rgba(236, 214, 190, 0.55), transparent 30%),
        linear-gradient(180deg, var(--bg-accent) 0%, var(--bg) 58%, #efe7db 100%);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

@keyframes fadeInFade {
    0% { opacity: 0; transform: translateY(6px); }
    100% { opacity: 1; transform: translateY(0); }
}

/* --- Main Layout Container for Vertical Rhythm --- */
.page-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
    animation: fadeInFade 0.4s cubic-bezier(0.2, 1, 0.4, 1) forwards;
}

/* --- Header & Logo --- */
.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    padding: 2rem 0 1.25rem;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.04em;
}

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

.logo span {
    color: var(--accent);
}

.header-nav {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
}

.header-nav a,
.lang-toggle {
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 0.7rem 1rem;
    background: rgba(255, 255, 255, 0.42);
    color: var(--muted-strong);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
    transition: background-color 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.lang-toggle {
    cursor: pointer;
    font-family: inherit;
}

.header-nav a:hover,
.lang-toggle:hover {
    background: rgba(255, 255, 255, 0.75);
    border-color: rgba(74, 56, 36, 0.2);
    transform: translateY(-1px);
}

/* --- Main Content Area --- */
.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    width: 100%;
    padding: 2.25rem 0 4rem;
}

.hero {
    position: relative;
    padding: 3.5rem;
    border: 1px solid var(--line);
    border-radius: 32px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.78), rgba(249, 240, 230, 0.9));
    box-shadow: var(--shadow);
    overflow: hidden;
}

.hero::after {
    content: "";
    position: absolute;
    right: -3rem;
    top: -4rem;
    width: 16rem;
    height: 16rem;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(217, 108, 58, 0.18), rgba(217, 108, 58, 0));
    pointer-events: none;
}

.hero-kicker,
.section-label {
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent);
}

.hero h1 {
    max-width: 10ch;
    margin-top: 1rem;
    font-size: clamp(3rem, 6vw, 5.2rem);
    line-height: 0.96;
    letter-spacing: -0.06em;
}

.hero-description {
    max-width: 46rem;
    margin-top: 1.5rem;
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--muted-strong);
}

.apps-section {
    margin-top: 2rem;
    padding: 1.25rem 0 0;
}

.section-heading {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.section-heading h2 {
    font-size: 2.1rem;
    letter-spacing: -0.04em;
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    width: 100%;
}

.app-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.1rem;
    text-decoration: none;
    color: var(--text);
    width: 100%;
    padding: 1.35rem;
    border: 1px solid var(--line);
    border-radius: 24px;
    background: var(--surface);
    backdrop-filter: blur(12px);
    min-height: 21rem;
    box-shadow: 0 10px 30px rgba(61, 42, 20, 0.04);
    transition: transform 0.28s ease, background-color 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}

.app-item img {
    width: 104px;
    height: 104px;
    flex: 0 0 104px;
    border-radius: 22.5%;
    box-shadow: 0 12px 30px rgba(31, 20, 10, 0.12);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.app-item:hover {
    transform: translateY(-4px);
    background: var(--surface-strong);
    border-color: rgba(74, 56, 36, 0.18);
    box-shadow: 0 18px 40px rgba(61, 42, 20, 0.08);
}

.app-item:hover img {
    transform: scale(1.04);
    box-shadow: 0 16px 34px rgba(31, 20, 10, 0.16);
}

.app-title {
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: -0.03em;
    color: var(--text);
}

.app-description {
    margin-top: 0.55rem;
    font-size: 0.95rem;
    line-height: 1.65;
    color: var(--muted);
    max-width: 22ch;
}

.app-cta {
    display: inline-block;
    margin-top: 1.2rem;
    font-size: 0.84rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
}

/* --- Footer --- */
.site-footer {
    padding: 3rem 0 4rem;
    text-align: center;
}

.site-footer p {
    display: inline-block;
    border-top: 1px solid rgba(74, 56, 36, 0.12);
    padding-top: 1.5rem;
    font-weight: 600;
    font-size: 0.98rem;
    color: var(--text);
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 0.5rem;
    flex-wrap: wrap;
}

.footer-nav a {
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 0.7rem 1.2rem;
    background: rgba(255, 255, 255, 0.42);
    color: var(--muted-strong);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
    transition: background-color 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.footer-nav a:hover {
    background: rgba(255, 255, 255, 0.75);
    border-color: rgba(74, 56, 36, 0.2);
    transform: translateY(-1px);
    color: var(--text);
    text-decoration: none;
}

.privacy-actions {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.privacy-actions a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.75rem;
    padding: 0.7rem 1rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.72);
    color: var(--muted-strong);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
    transition: background-color 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.privacy-actions a:hover {
    background: rgba(255, 255, 255, 0.92);
    border-color: rgba(74, 56, 36, 0.2);
    transform: translateY(-1px);
}


/* --- Privacy Page Specific Styles --- */
.privacy-content {
    width: 100%;
    max-width: 800px;
    padding: 2rem 0;
    color: #4a4a4a;
    margin-left: auto;
    margin-right: auto;
    /* 核心改动：确保父容器内的所有文本都默认为居中对齐 */
    text-align: center; 
}

.privacy-content h1 {
    font-size: 2.8rem;
    font-weight: 700;
    color: #111;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid #e0e0e0;
    padding-bottom: 1.5rem;
}

.privacy-content h2 {
    font-size: 1.7rem;
    font-weight: 600;
    color: #222;
    margin-top: 3.5rem;
    margin-bottom: 2rem;
}

.privacy-content p, .privacy-content ul {
    font-size: 1.1rem;
    line-height: 1.9;
    margin-bottom: 2rem;
    /* 核心改动：移除了这里的 text-align: left; */
}

.privacy-content ul {
    /* 核心改动：移除列表符号和边距，因为它们在居中时不好看 */
    list-style-type: none;
    padding-left: 0;
}

.privacy-content ul li {
    margin-bottom: 1.2rem;
}

.privacy-content a {
    color: #007aff;
    text-decoration: none;
    border-bottom: 1px solid #007aff;
}
.privacy-content a:hover {
    color: #0056b3;
    border-bottom-color: #0056b3;
}

.privacy-content--document {
    max-width: 900px;
    padding: 0;
    text-align: left;
}

.privacy-content--document h1 {
    margin-bottom: 1.25rem;
}

.policy-hero {
    margin-bottom: 1.5rem;
    padding: 1.6rem 1.6rem 1.4rem;
    border: 1px solid var(--line);
    border-radius: 24px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.82), rgba(247, 239, 229, 0.95));
    box-shadow: 0 14px 36px rgba(61, 42, 20, 0.05);
}

.policy-kicker {
    margin-bottom: 0.7rem;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent);
}

.policy-summary {
    max-width: 42rem;
    margin-top: 0.75rem;
}

.policy-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin-top: 1rem;
}

.policy-meta span,
.policy-toc a {
    display: inline-flex;
    align-items: center;
    min-height: 2.4rem;
    padding: 0.55rem 0.85rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.72);
    color: var(--muted-strong);
    font-size: 0.92rem;
    text-decoration: none;
}

.policy-toc {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.policy-toc a:hover {
    background: rgba(255, 255, 255, 0.92);
    border-color: rgba(74, 56, 36, 0.2);
}

.privacy-content--document h2 {
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.privacy-content--document h3 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-size: 1.15rem;
    color: var(--text);
}

.privacy-content--document p,
.privacy-content--document ul {
    margin-bottom: 1.1rem;
    color: var(--muted-strong);
    line-height: 1.85;
    text-align: left;
}

.privacy-content--document ul {
    list-style: disc;
    padding-left: 1.4rem;
}

.privacy-content--document ul li {
    margin-bottom: 0.85rem;
}


/* --- Responsive Design for Mobile --- */
@media (max-width: 768px) {
    .page-container {
        padding: 0 1.5rem;
    }

    .site-header {
        padding: 1.5rem 0 1rem;
    }

    .header-nav {
        gap: 0.5rem;
    }

    .header-nav a,
    .lang-toggle {
        padding: 0.65rem 0.9rem;
    }

    .hero {
        padding: 2rem;
    }

    .hero h1 {
        max-width: 12ch;
    }

    .site-footer { padding: 4rem 0; }

    .app-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 1rem;
    }

    .privacy-actions {
        gap: 0.6rem;
    }
}

@media (max-width: 600px) {
    .page-container {
        padding: 0 1rem;
    }

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

    .header-nav {
        flex-wrap: wrap;
    }

    .main-content {
        padding-top: 1rem;
    }

    .hero {
        padding: 1.4rem;
        border-radius: 24px;
    }

    .hero h1 {
        font-size: 2.6rem;
    }

    .hero-description {
        font-size: 1rem;
        line-height: 1.7;
    }

    .section-heading {
        flex-direction: column;
        margin-bottom: 1rem;
    }

    .section-heading h2 {
        font-size: 1.8rem;
    }

    .app-grid {
        grid-template-columns: 1fr;
        gap: 0.9rem;
    }

    .app-item {
        min-height: auto;
        padding: 1rem;
        border-radius: 20px;
    }

    .app-item img {
        width: 88px;
        height: 88px;
        flex-basis: 88px;
    }

    .app-description {
        font-size: 0.95rem;
        max-width: none;
    }

    .logo, .privacy-content h1 {
        text-align: left;
    }

    .privacy-content h1 { font-size: 2.2rem; }
    .privacy-content h2 { font-size: 1.5rem; }
    .privacy-content p, .privacy-content ul { font-size: 1rem; }

    .privacy-actions a {
        width: 100%;
    }

    .privacy-content--document h2 {
        font-size: 1.35rem;
    }

    .privacy-content--document h3 {
        font-size: 1.05rem;
    }

    .policy-hero {
        padding: 1.2rem;
        border-radius: 20px;
    }

    .policy-toc {
        gap: 0.55rem;
    }

    .policy-toc a,
    .policy-meta span {
        width: 100%;
    }
}