/* ========================================
   浮生闲思集 - 样式表
   ======================================== */

/* --- 基础重置与变量 --- */
:root {
    --color-bg: #faf8f5;
    --color-bg-alt: #f3efe8;
    --color-text: #3d3929;
    --color-text-light: #7a7360;
    --color-text-lighter: #a09880;
    --color-accent: #8b6f47;
    --color-accent-hover: #6b5535;
    --color-card: #fffefb;
    --color-border: #e5e0d5;
    --color-ink: #2c2416;
    --color-gold: #c4a97d;

    --font-serif: 'Noto Serif SC', 'SimSun', 'STSong', Georgia, 'Times New Roman', serif;
    --font-sans: 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', -apple-system, sans-serif;

    --max-width: 1200px;
    --nav-height: 70px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-serif);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* --- 导航栏 --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    transition: background var(--transition), box-shadow var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.navbar.scrolled {
    background: rgba(250, 248, 245, 0.92);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.06);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--color-ink);
    letter-spacing: 0.05em;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--color-text-light);
    letter-spacing: 0.03em;
    transition: color var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width var(--transition);
}

.nav-links a:hover {
    color: var(--color-accent);
}

.nav-links a:hover::after {
    width: 100%;
}

/* --- Hero 主视觉 --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(180deg,
        #f5f0e8 0%,
        #f0ead8 30%,
        #ece4d0 60%,
        #f3efe8 100%);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(139, 111, 71, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(139, 111, 71, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(196, 169, 125, 0.05) 0%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: 2rem;
    max-width: 700px;
}

.hero-eyebrow {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    color: var(--color-accent);
    letter-spacing: 0.2em;
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeUp 0.8s ease-out 0.2s forwards;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.8rem, 6vw, 4.5rem);
    font-weight: 700;
    color: var(--color-ink);
    letter-spacing: 0.12em;
    line-height: 1.15;
    margin-bottom: 1.8rem;
    opacity: 0;
    animation: fadeUp 0.8s ease-out 0.4s forwards;
}

.hero-subtitle {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--color-text-light);
    letter-spacing: 0.06em;
    line-height: 2;
    opacity: 0;
    animation: fadeUp 0.8s ease-out 0.6s forwards;
}

.hero-scroll {
    position: absolute;
    bottom: 2.5rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    opacity: 0;
    animation: fadeUp 0.8s ease-out 1.2s forwards;
}

.hero-scroll span {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    color: var(--color-text-lighter);
    letter-spacing: 0.15em;
}

.scroll-icon {
    width: 1px;
    height: 36px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

/* 粒子装饰 */
.hero-particles {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
}

.particle {
    position: absolute;
    background: var(--color-gold);
    border-radius: 50%;
    opacity: 0;
    animation: particleFloat 6s ease-in-out infinite;
}

/* --- 随笔区 --- */
.essays-section {
    padding: 8rem 0 6rem;
    background: var(--color-bg);
}

.section-header {
    text-align: center;
    margin-bottom: 5rem;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-accent);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 3.5vw, 2.8rem);
    font-weight: 600;
    color: var(--color-ink);
    letter-spacing: 0.08em;
    margin-bottom: 1.2rem;
}

.section-divider {
    width: 40px;
    height: 1px;
    background: var(--color-accent);
    margin: 0 auto;
}

.essays-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2rem;
}

/* 文章卡片 */
.essay-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: 2px;
    padding: 2.2rem;
    transition: transform var(--transition), box-shadow var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.essay-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 0;
    background: var(--color-accent);
    transition: height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.essay-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.06);
}

.essay-card:hover::before {
    height: 100%;
}

.card-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.card-date {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    color: var(--color-text-lighter);
    letter-spacing: 0.05em;
}

.card-category {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    color: var(--color-accent);
    letter-spacing: 0.1em;
    padding: 0.15rem 0.7rem;
    border: 1px solid var(--color-border);
    border-radius: 1px;
}

.card-title {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.card-title a {
    transition: color var(--transition);
}

.card-title a:hover {
    color: var(--color-accent);
}

.card-excerpt {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.9;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-footer {
    margin-top: 1.5rem;
    padding-top: 1.2rem;
    border-top: 1px solid var(--color-border);
}

.read-more {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    color: var(--color-accent);
    letter-spacing: 0.08em;
    transition: letter-spacing var(--transition);
}

.essay-card:hover .read-more {
    letter-spacing: 0.15em;
}

/* --- 引用区 --- */
.quote-section {
    padding: 6rem 0;
    background: var(--color-bg-alt);
    position: relative;
    overflow: hidden;
}

.quote-section::before {
    content: '❝';
    position: absolute;
    top: 50%;
    left: 10%;
    transform: translateY(-50%);
    font-size: 12rem;
    color: rgba(139, 111, 71, 0.04);
    font-family: var(--font-serif);
    line-height: 1;
    pointer-events: none;
}

.quote-inner {
    max-width: 700px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
    position: relative;
    z-index: 1;
}

.quote-inner blockquote p {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    font-weight: 400;
    color: var(--color-ink);
    letter-spacing: 0.06em;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.quote-inner blockquote cite {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    color: var(--color-text-light);
    font-style: normal;
    letter-spacing: 0.05em;
}

/* --- 关于区 --- */
.about-section {
    padding: 8rem 0;
    background: var(--color-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 5rem;
    align-items: center;
}

.about-text .section-tag {
    margin-bottom: 1rem;
}

.about-text .section-title {
    margin-bottom: 1rem;
}

.about-text .section-divider {
    margin: 0 0 2.5rem 0;
}

.about-text p {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    color: var(--color-text-light);
    line-height: 2;
    margin-bottom: 1.2rem;
    letter-spacing: 0.03em;
}

.about-signature {
    margin-top: 2.5rem;
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--color-accent);
    letter-spacing: 0.1em;
}

/* 水墨装饰块 */
.about-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.ink-block {
    position: relative;
    width: 260px;
    height: 260px;
}

.ink-circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle at 40% 40%,
        rgba(139, 111, 71, 0.25) 0%,
        rgba(139, 111, 71, 0.12) 30%,
        rgba(196, 169, 125, 0.06) 60%,
        transparent 100%);
    animation: inkBreathe 4s ease-in-out infinite;
}

.ink-circle.small {
    width: 100px;
    height: 100px;
    top: 30%;
    left: 70%;
    animation-delay: 1.5s;
}

.ink-line {
    position: absolute;
    top: 50%;
    left: 10%;
    width: 80%;
    height: 1px;
    background: linear-gradient(to right,
        transparent,
        rgba(139, 111, 71, 0.2),
        transparent);
}

/* --- 页脚 --- */
.footer {
    background: var(--color-bg-alt);
    padding: 5rem 0 2rem;
    border-top: 1px solid var(--color-border);
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand h3 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 0.8rem;
    letter-spacing: 0.06em;
}

.footer-brand p {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.8;
    max-width: 280px;
}

.footer-links h4,
.footer-connect h4 {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-ink);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 1.2rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.6rem;
}

.footer-links a {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    color: var(--color-text-light);
    transition: color var(--transition);
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-connect p {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.footer-email {
    font-family: var(--font-serif);
    color: var(--color-accent) !important;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-bottom p {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    color: var(--color-text-lighter);
    letter-spacing: 0.05em;
}

/* --- 动画 --- */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes particleFloat {
    0%, 100% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }
    10% {
        opacity: 0.5;
    }
    90% {
        opacity: 0;
    }
    100% {
        transform: translateY(-120px) translateX(20px);
        opacity: 0;
    }
}

@keyframes inkBreathe {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.8;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.08);
        opacity: 1;
    }
}

/* 滚动淡入 */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- 响应式 --- */
@media (max-width: 768px) {
    .nav-links {
        gap: 1.5rem;
    }

    .hero-title {
        font-size: 2.4rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
    }

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

    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .about-visual {
        order: -1;
    }

    .ink-block {
        width: 180px;
        height: 180px;
    }

    .ink-circle {
        width: 150px;
        height: 150px;
    }

    .ink-circle.small {
        width: 70px;
        height: 70px;
        top: 28%;
        left: 68%;
    }

    .footer-inner {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .quote-inner blockquote p {
        font-size: 1.3rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .essay-card {
        padding: 1.6rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1.2rem;
    }

    .hero-title {
        font-size: 2rem;
        letter-spacing: 0.08em;
    }

    .nav-brand {
        font-size: 1.1rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .nav-links a {
        font-size: 0.8rem;
    }

    .essays-section {
        padding: 5rem 0 4rem;
    }

    .about-section {
        padding: 5rem 0;
    }

    .quote-section {
        padding: 4rem 0;
    }
}