/* ============================================================
   作品集 — 水墨风样式
   ============================================================ */

:root {
    /* 宣纸色系 */
    --paper: #f6f1e3;          /* 宣纸底 */
    --paper-deep: #efe8d5;     /* 深一档 */
    --card: #faf6ea;           /* 卡片 */
    --ink: #2b2b2b;            /* 浓墨 */
    --ink-soft: #6b6659;       /* 淡墨 */
    --ink-faint: #9a9484;      /* 极淡墨 */
    --line: #d8cfb8;           /* 墨线 */
    --seal: #b03a2e;           /* 印章红 */
    --seal-soft: rgba(176, 58, 46, 0.08);

    --font-serif: "Kaiti SC", "STKaiti", "KaiTi", "楷体",
        "Songti SC", "SimSun", "宋体", serif;
    --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
        -apple-system, sans-serif;

    --radius: 10px;
    --content: 1080px;

    --shadow: 0 6px 20px rgba(60, 50, 30, 0.08);
    --shadow-hover: 0 14px 36px rgba(60, 50, 30, 0.14);

    --ease: cubic-bezier(0.22, 1, 0.36, 1);
    --dur: 0.4s;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-serif);
    background: var(--paper);
    color: var(--ink);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    /* 宣纸纹理 */
    background-image:
        radial-gradient(circle at 12% 18%, rgba(120, 100, 60, 0.05), transparent 40%),
        radial-gradient(circle at 88% 82%, rgba(120, 100, 60, 0.05), transparent 42%),
        radial-gradient(circle at 70% 10%, rgba(176, 58, 46, 0.03), transparent 30%);
    background-attachment: fixed;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }

/* ---------- 页头 ---------- */
.page-head {
    text-align: center;
    padding: 72px 24px 40px;
    position: relative;
}

.head-title {
    display: inline-block;
    font-size: 2.6rem;
    font-weight: 700;
    letter-spacing: 0.3em;
    text-indent: 0.3em;
    color: var(--ink);
    position: relative;
    padding-bottom: 18px;
}

/* 标题下方墨线 */
.head-title::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 56px;
    height: 2px;
    background: var(--ink);
    opacity: 0.6;
    border-radius: 2px;
}

.head-sub {
    margin-top: 18px;
    color: var(--ink-soft);
    font-size: 1.05rem;
    letter-spacing: 0.12em;
}

/* ---------- 作品区 ---------- */
.page-main {
    max-width: var(--content);
    margin: 0 auto;
    padding: 16px 24px 72px;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 32px;
}

/* 卡片：宣纸质感 + 墨线边框 */
.project-card {
    position: relative;
    display: block;
    border-radius: var(--radius);
    background: var(--card);
    border: 1px solid var(--line);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform var(--dur) var(--ease),
                box-shadow var(--dur) var(--ease),
                border-color var(--dur) var(--ease);
}
.project-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--ink-faint);
}

/* 卡片左上角墨点装饰 */
.project-card::before {
    content: "";
    position: absolute;
    top: 14px;
    left: 14px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--ink);
    opacity: 0.35;
    z-index: 2;
    transition: opacity var(--dur) var(--ease);
}
.project-card:hover::before { opacity: 0.7; }

.project-cover {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--paper-deep);
    border-bottom: 1px solid var(--line);
}
.project-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: saturate(0.85) contrast(1.02);
    transition: transform 0.6s var(--ease), filter var(--dur) var(--ease);
}
.project-card:hover .project-cover img {
    transform: scale(1.05);
    filter: saturate(1) contrast(1.02);
}

.project-cover-fallback {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    font-size: 3rem;
    color: var(--ink-faint);
    background: var(--paper-deep);
}

.project-body {
    padding: 20px 22px 24px;
}

.project-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--ink);
}

/* 进入箭头 */
.project-arrow {
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 1px solid var(--line);
    color: var(--ink-soft);
    flex-shrink: 0;
    transition: color var(--dur) var(--ease),
                border-color var(--dur) var(--ease),
                background var(--dur) var(--ease),
                transform var(--dur) var(--ease);
}
.project-card:hover .project-arrow {
    color: var(--seal);
    border-color: var(--seal);
    transform: rotate(-45deg);
}

.project-desc {
    margin: 10px 0 16px;
    color: var(--ink-soft);
    font-size: 0.92rem;
    line-height: 1.7;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.project-tag {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    letter-spacing: 0.04em;
    padding: 3px 12px;
    border-radius: 999px;
    border: 1px solid var(--line);
    color: var(--ink-soft);
    background: var(--paper);
}

/* ---------- 页脚 ---------- */
.page-foot {
    text-align: center;
    padding: 28px 24px 40px;
    color: var(--ink-faint);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
}

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--line);
    border-radius: 10px;
    border: 2px solid var(--paper);
}
::-webkit-scrollbar-thumb:hover { background: var(--ink-faint); }

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
    .page-head { padding: 52px 20px 32px; }
    .head-title { font-size: 2rem; }
    .page-main { padding: 8px 16px 56px; }
    .projects-grid { grid-template-columns: 1fr; gap: 24px; }
}