/* CodesFans 品牌样式（基于 TK UI）：蓝 · 紫 · 白粉 */
:root {
  --tk-primary: #6d5cf6;
  --tk-radius: 16px;
  --blue: #3b82f6;
  --purple: #8b5cf6;
  --pink: #f472b6;
  --blush: #fdf2f8;
  --grad: linear-gradient(120deg, var(--blue), var(--purple) 55%, var(--pink));
  --tk-bg: #fbf9ff;
  --tk-surface-2: #f5f2ff;
  --tk-border: #ebe6fb;
}

body { overflow-x: hidden; }
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.grad-bg { background: var(--grad); color: #fff; }
.brand-mark { background: var(--grad); font-family: var(--tk-mono); letter-spacing: -.05em; }
.btn.grad { --_bg: var(--grad); --_fg: #fff; --_bd: transparent; background: var(--grad); }
.btn.grad:hover { box-shadow: 0 10px 28px color-mix(in oklab, var(--purple) 40%, transparent); filter: saturate(1.1); }
.btn.white { --_bg: #fff; --_fg: #5b47e0; --_bd: transparent; }
.btn.glass { --_bg: rgb(255 255 255 / .14); --_fg: #fff; --_bd: rgb(255 255 255 / .5); }
.nav-menu .btn { color: #fff; margin-left: .5rem; }
.nav-menu .btn:hover { color: #fff; background: var(--grad); }
@media (max-width: 768px) { .nav-menu .btn { margin: .5rem 0 0; } }

/* 背景光晕 */
/* 光斑用径向渐变绘制（静态，无动画） */
.blobs { position: absolute; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.blobs span { position: absolute; border-radius: 50%; opacity: .6; }
.blobs span:nth-child(1) { width: 56vmax; height: 56vmax; left: -20vmax; top: -22vmax; background: radial-gradient(closest-side, color-mix(in oklab, var(--blue) 55%, transparent), transparent); }
.blobs span:nth-child(2) { width: 50vmax; height: 50vmax; right: -17vmax; top: -3vmax; background: radial-gradient(closest-side, color-mix(in oklab, var(--purple) 50%, transparent), transparent); }
.blobs span:nth-child(3) { width: 44vmax; height: 44vmax; left: 25%; bottom: -24vmax; background: radial-gradient(closest-side, color-mix(in oklab, var(--pink) 45%, transparent), transparent); }
/* 底部渐隐到页面背景（静态覆盖层，替代 mask-image） */
.hero-x::after { content: ""; position: absolute; inset: auto 0 0; height: 35%; z-index: -1; pointer-events: none;
  background: linear-gradient(transparent, var(--tk-bg)); }

/* Hero */
.hero-x { position: relative; isolation: isolate; padding: clamp(3rem, 8vw, 6.5rem) 0 clamp(3rem, 7vw, 5.5rem); }
.hero-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.hero-x h1 { font-size: clamp(2.1rem, 3vw + 1rem, 3.3rem); text-wrap: balance; }
.hero-x .lead { max-width: 560px; margin-bottom: 2rem; }
.hero-x .eyebrow { background: color-mix(in oklab, var(--tk-surface) 85%, transparent); }
.platform-line { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 2rem; }
.platform-line span { padding: .3rem .8rem; border-radius: 999px; font-size: .82rem; font-weight: 600; color: var(--tk-primary-text);
  background: color-mix(in oklab, var(--tk-surface) 85%, transparent); border: 1px solid var(--tk-border); }
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { text-align: center; }
  .hero-x .lead { margin-inline: auto; }
  .hero-copy .row, .platform-line { justify-content: center; }
}

/* 代码窗口插画 */
.stage { position: relative; padding: 2rem 1.5rem; }
.code-win { position: relative; z-index: 1; border-radius: 18px; overflow: hidden; background: #15122b; color: #e9e6ff;
  box-shadow: 0 30px 70px -20px color-mix(in oklab, var(--purple) 55%, transparent), 0 0 0 1px rgb(255 255 255 / .06);
  transform: perspective(1200px) rotateY(-6deg) rotateX(3deg); }
.code-bar { display: flex; align-items: center; gap: .45rem; padding: .8rem 1rem; background: rgb(255 255 255 / .05); }
.code-bar i { width: 11px; height: 11px; border-radius: 50%; background: #ff6b8b; }
.code-bar i:nth-child(2) { background: #ffcf5c; } .code-bar i:nth-child(3) { background: #5ce0a8; }
.code-bar b { margin-left: .5rem; font: 500 .78rem var(--tk-mono); color: #9d97c7; }
.code-win pre { margin: 0; padding: 1.1rem 1.25rem 1.4rem; background: none; border: 0; border-radius: 0; color: inherit; font-size: clamp(.72rem, .6vw + .5rem, .86rem); line-height: 1.75; overflow-x: auto; }
.c-k { color: #c49bff; } .c-v { color: #7cc4ff; } .c-s { color: #ffa8d4; } .c-p { color: #9d97c7; } .c-c { color: #6f6a99; font-style: italic; }
.cursor { display: inline-block; width: .55em; height: 1.1em; vertical-align: -.2em; background: #ffa8d4; }
.chip { position: absolute; z-index: 2; display: inline-flex; align-items: center; gap: .4rem; padding: .5rem .85rem; border-radius: 999px;
  font-size: .82rem; font-weight: 700; background: var(--tk-surface); color: var(--tk-text); box-shadow: var(--tk-shadow-lg);
  border: 1px solid var(--tk-border); white-space: nowrap; }
.chip.c1 { top: 0; left: 0; } .chip.c2 { top: 38%; right: -.5rem; } .chip.c3 { bottom: .25rem; left: 12%; }
@media (max-width: 520px) { .chip.c2 { right: 0; } }

/* 区块标题 */
.sec-head { text-align: center; max-width: 640px; margin: 0 auto clamp(2rem, 4vw, 3rem); }
.sec-head .kicker { display: inline-block; font: 700 .78rem var(--tk-mono); letter-spacing: .12em; text-transform: uppercase; margin-bottom: .75rem; }

/* 平台卡片 */
.platform { position: relative; }
.platform::before { content: ""; position: absolute; inset: 0 0 auto; height: 3px; background: var(--grad); opacity: 0; transition: opacity .3s; }
.platform:hover::before { opacity: 1; }
.platform .icon-box { width: 52px; height: 52px; border-radius: 14px; background: var(--grad); color: #fff;
  box-shadow: 0 10px 24px -8px color-mix(in oklab, var(--purple) 60%, transparent); }
.platform .icon-box svg { width: 26px; height: 26px; }
.tags { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: 1rem; }
.tags span { font: 500 .74rem var(--tk-mono); padding: .2rem .55rem; border-radius: 6px; background: var(--tk-surface-2); color: var(--tk-muted); }

/* 兴趣 */
.hobby { position: relative; overflow: hidden; min-height: 230px; display: flex; flex-direction: column; justify-content: flex-end; }
.hobby .art { position: absolute; top: 1rem; right: 1rem; width: 96px; height: 96px; opacity: .95; transition: transform .5s var(--tk-ease); }
.hobby:hover .art { transform: rotate(-8deg) scale(1.08); }
.hobby.blue { background: linear-gradient(160deg, color-mix(in oklab, var(--blue) 14%, var(--tk-surface)), var(--tk-surface) 60%); }
.hobby.purple { background: linear-gradient(160deg, color-mix(in oklab, var(--purple) 16%, var(--tk-surface)), var(--tk-surface) 60%); }
.hobby.pink { background: linear-gradient(160deg, color-mix(in oklab, var(--pink) 18%, var(--tk-surface)), var(--tk-surface) 60%); }
.hobby h3 { margin-bottom: .35rem; }
.hobby p { margin: 0; }

/* 联系 */
.contact-card { position: relative; overflow: hidden; text-align: center; padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1.5rem, 5vw, 3rem); border: 0; }
.contact-card::after { content: ""; position: absolute; inset: auto -20% -60% auto; width: 60%; aspect-ratio: 1; border-radius: 50%; background: rgb(255 255 255 / .12); }
.contact-card h2 { color: #fff; }
.contact-card p { color: rgb(255 255 255 / .9); max-width: 560px; margin: 0 auto 1.75rem; }

.footer .brand { font-size: 1rem; }