/* ============================================================
   网站功能开发页 - 布艺配饰风自由聚散布局
   独立样式,与全站共享 style.css 配合使用
   ============================================================ */

/* ---------- Banner 区:代码吊牌感 ---------- */
.fd-banner { padding-top: 170px; }
.fd-banner h1 em {
    font-style: normal; color: var(--sage-deep); position: relative;
}
.fd-banner h1 em::after {
    content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 10px;
    background: var(--lotus-soft); z-index: -1; border-radius: 6px;
}
.banner-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 30px; }

/* Banner 视觉区:代码吊牌 */
.fd-banner-visual { position: relative; height: 380px; }
.fd-banner-visual img {
    width: 100%; height: 100%; object-fit: cover;
    border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) 8px;
    box-shadow: var(--shadow); transform: rotate(-1.5deg);
}
.fd-banner-visual .pb-tag {
    position: absolute; bottom: -16px; right: -10px; background: var(--white);
    padding: 10px 18px; border-radius: 8px; box-shadow: var(--shadow-sm);
    font-size: .85rem; color: var(--ink); font-weight: 500;
}
/* 代码片段吊牌 */
.code-tag {
    position: absolute; background: var(--ink); color: var(--lotus-soft);
    padding: 8px 14px; border-radius: 6px; box-shadow: var(--shadow-sm);
    font-size: .76rem; font-family: monospace; z-index: 3;
}
.code-tag::before {
    content: ""; position: absolute; top: -10px; left: 50%; transform: translateX(-50%);
    width: 2px; height: 14px; background: var(--ink-mute);
}
.code-tag.ct-1 { top: -18px; left: 10%; transform: rotate(-7deg); }
.code-tag.ct-2 { top: 42%; right: -8%; transform: rotate(6deg); background: var(--sage-deep); color: var(--white); }

/* ---------- 功能模块网格:不规则混排(Bento 风) ---------- */
.fd-modules { padding-top: clamp(60px, 8vw, 100px); }
.fd-head { text-align: center; margin-bottom: 56px; }
.fd-head .tag-label { margin-bottom: 18px; }
.fd-head .sec-desc { margin: 0 auto; }

/* 4列Bento网格,大小卡混排 */
.fd-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: minmax(220px, auto);
    gap: 22px;
}
.fd-card {
    background: var(--white); border-radius: var(--radius-lg); padding: 32px 30px;
    border: 1px solid var(--line); box-shadow: var(--shadow-sm); position: relative;
    transition: transform .4s, box-shadow .4s; display: flex; flex-direction: column;
}
.fd-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }

/* 大卡占2列2行 */
.fd-big { grid-column: span 2; grid-row: span 2; }
/* 中卡占2列1行 */
.fd-mid { grid-column: span 2; }
/* 小卡占1列1行 */
.fd-sm { grid-column: span 1; }

/* 错位微调:第2、4卡向下偏移 */
.fd-card:nth-child(2) { transform: translateY(20px); }
.fd-card:nth-child(4) { transform: translateY(20px); }
.fd-card:nth-child(2):hover { transform: translateY(14px); }
.fd-card:nth-child(4):hover { transform: translateY(14px); }

/* 图标 */
.fd-ic {
    width: 60px; height: 60px; border-radius: 16px; display: grid; place-items: center;
    background: var(--lotus-soft); margin-bottom: 22px;
}
.fd-card:nth-child(even) .fd-ic { background: var(--sage-soft); }
.fd-ic svg { width: 32px; height: 32px; }

.fd-no {
    position: absolute; top: 26px; right: 30px; font-family: var(--f-serif);
    font-size: 1.6rem; color: var(--cream-3); font-weight: 600;
}
.fd-card h3 { margin-bottom: 12px; }
.fd-card p { font-size: .92rem; flex: 1; }

/* 卡内功能点小标签 */
.fd-tags {
    display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px;
}
.fd-tags li {
    font-size: .76rem; padding: 4px 12px; border-radius: 20px;
    background: var(--cream-2); color: var(--ink-soft); letter-spacing: .5px;
}
.fd-card:nth-child(even) .fd-tags li { background: var(--sage-soft); color: var(--sage-deep); }
.fd-card:nth-child(odd) .fd-tags li { background: var(--lotus-soft); color: var(--lotus-deep); }

/* 大卡描述加大 */
.fd-big h3 { font-size: 1.5rem; }
.fd-big p { font-size: .98rem; }

/* ---------- 技术栈徽章云 ---------- */
.fd-stack { position: relative; overflow: hidden; }
.badge-cloud {
    display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 12px;
    max-width: 880px; margin: 0 auto; position: relative;
}
/* 缝线装饰背景 */
.badge-cloud::before {
    content: ""; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: 460px; height: 460px; border-radius: 50%;
    border: 2px dashed var(--line); opacity: .5; z-index: 0;
}
.stack-badge {
    position: relative; z-index: 1; padding: 9px 20px; border-radius: 30px;
    font-size: .9rem; font-weight: 500; letter-spacing: .5px;
    background: var(--white); border: 1px solid var(--line);
    transition: transform .35s, box-shadow .35s, background .35s;
    box-shadow: var(--shadow-sm);
}
.stack-badge:hover { transform: translateY(-4px) rotate(-2deg); box-shadow: var(--shadow); }
/* 不同尺寸营造云朵错落 */
.stack-badge:nth-child(3n) { font-size: 1.05rem; padding: 11px 24px; }
.stack-badge:nth-child(5n) { font-size: .82rem; padding: 7px 16px; }
.stack-badge:nth-child(7n) { transform: translateY(8px); }
.stack-badge:nth-child(7n):hover { transform: translateY(4px) rotate(-2deg); }

/* 按类别配色 */
.sb-front { color: var(--lotus-deep); border-color: var(--lotus); }
.sb-front:hover { background: var(--lotus-soft); }
.sb-back { color: var(--sage-deep); border-color: var(--sage); }
.sb-back:hover { background: var(--sage-soft); }
.sb-tool { color: var(--ink-soft); border-color: var(--cream-3); }
.sb-tool:hover { background: var(--cream-2); }

/* 图例 */
.stack-legend {
    display: flex; justify-content: center; gap: 28px; margin-top: 40px;
    font-size: .86rem; color: var(--ink-soft);
}
.stack-legend span { display: flex; align-items: center; gap: 8px; }
.stack-legend .dot { width: 12px; height: 12px; border-radius: 50%; }
.stack-legend .dot-front { background: var(--lotus-deep); }
.stack-legend .dot-back { background: var(--sage-deep); }
.stack-legend .dot-tool { background: var(--ink-mute); }

/* ---------- 开发流程:纵向缝线连接 ---------- */
.dev-track {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative;
}
/* 横向缝线 */
.dev-track::before {
    content: ""; position: absolute; top: 38px; left: 6%; right: 6%; height: 2px;
    background: repeating-linear-gradient(90deg, var(--sage) 0 10px, transparent 10px 20px);
    z-index: 0;
}
.dev-stage {
    background: var(--white); border-radius: var(--radius); padding: 28px 24px;
    border: 1px solid var(--line); position: relative; z-index: 1;
    transition: transform .4s, box-shadow .4s;
}
.dev-stage:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
.dev-stage-head {
    display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px;
}
.dev-stage-no {
    font-family: var(--f-serif); font-size: 1.8rem; color: var(--lotus-deep); font-weight: 600;
    line-height: 1;
}
.dev-stage:nth-child(even) .dev-stage-no { color: var(--sage-deep); }
.dev-stage-head svg { width: 36px; height: 36px; }
.dev-stage h4 { margin-bottom: 8px; }
.dev-stage p { font-size: .88rem; margin-bottom: 16px; }
.dev-out {
    display: inline-block; font-size: .76rem; padding: 5px 12px; border-radius: 20px;
    background: var(--cream-2); color: var(--ink-mute); letter-spacing: .5px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .fd-grid { grid-template-columns: repeat(2, 1fr); }
    .fd-big { grid-column: span 2; grid-row: span 1; }
    .fd-mid { grid-column: span 1; }
    .fd-sm { grid-column: span 1; }
    .fd-card:nth-child(2), .fd-card:nth-child(4) { transform: none; }
    .fd-card:nth-child(2):hover, .fd-card:nth-child(4):hover { transform: translateY(-6px); }
}
@media (max-width: 860px) {
    .dev-track { grid-template-columns: repeat(2, 1fr); gap: 28px; }
    .dev-track::before { display: none; }
    .badge-cloud::before { width: 320px; height: 320px; }
}
@media (max-width: 560px) {
    .fd-banner-visual { height: 260px; }
    .fd-grid { grid-template-columns: 1fr; }
    .fd-big, .fd-mid, .fd-sm { grid-column: span 1; }
    .fd-card { padding: 26px 22px; }
    .dev-track { grid-template-columns: 1fr; }
    .stack-legend { flex-wrap: wrap; gap: 16px; }
    .fd-banner h1 { font-size: 1.8rem; }
    .badge-cloud::before { width: 240px; height: 240px; }
}