@charset "UTF-8";
:root {
  color-scheme: light;
  --background: #f7f8fa;
  --surface: #ffffff;
  --text: #202b3d;
  --muted: #737d8f;
  --subtle: #8b95a5;
  --border: #e8ebf0;
  --accent: #ee8856;
  --blue: #5277af;
  --blue-soft: #f0f4fa;
  --empty-bg: #f3f5f8;
  --shadow: 0 12px 28px #2538550a;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --background: #141a23;
  --surface: #1b2330;
  --text: #e5eaf2;
  --muted: #a0aec0;
  --subtle: #8997aa;
  --border: #2c3543;
  --blue: #96b7e4;
  --blue-soft: #253449;
  --empty-bg: #25303f;
  --shadow: 0 12px 28px #00000016;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; min-height: 100svh; display: flex; flex-direction: column; background: var(--background); color: var(--text); -webkit-font-smoothing: antialiased; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
a { color: inherit; text-decoration: none; }
button:focus-visible, a:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; }
::selection { color: var(--text); background: #ee885640; }
.icon-definitions { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
.site-header { height: 88px; border-bottom: 1px solid var(--border); background: var(--surface); }
.header-inner, .footer-inner { max-width: 1200px; height: 100%; padding: 0 40px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 14px; }
.brand-mark { width: 42px; height: 42px; border-radius: 13px; display: flex; align-items: center; justify-content: center; background: var(--text); color: var(--surface); font-size: 21px; font-weight: 750; letter-spacing: -1.5px; position: relative; }
.brand-mark span { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); position: absolute; right: 5px; bottom: 9px; }
.brand-name { font-size: 17px; font-weight: 650; letter-spacing: 1px; display: flex; align-items: center; gap: 12px; }
.brand-divider { color: var(--border); font-size: 20px; font-weight: 400; }
.brand-english { color: var(--subtle); font-size: 11px; font-weight: 500; letter-spacing: 2px; }
.header-actions { display: flex; align-items: center; gap: 22px; }
.personal-label { font-size: 12px; letter-spacing: 1px; color: var(--muted); }
.action-divider { width: 1px; height: 18px; background: var(--border); }
.theme-toggle { display: grid; place-items: center; width: 36px; height: 36px; background: transparent; color: var(--muted); border: 1px solid var(--border); border-radius: 10px; cursor: pointer; transition: color .2s, background .2s, transform .2s; }
.theme-toggle:hover { background: var(--blue-soft); color: var(--blue); transform: translateY(-1px); }
.theme-toggle .icon { width: 17px; height: 17px; }
.sun-icon, :root[data-theme="dark"] .moon-icon { display: none; }
:root[data-theme="dark"] .sun-icon { display: block; }
.main-content { width: 100%; max-width: 1200px; padding: 0 40px 76px; margin: 0 auto; flex: 1; }
.intro { position: relative; padding: 80px 0 65px; }
.eyebrow { display: flex; align-items: center; gap: 11px; color: var(--subtle); font-size: 10px; font-weight: 550; letter-spacing: 2px; line-height: 1.8; }
.accent-line { width: 22px; height: 2px; background: var(--accent); }
h1 { font-size: clamp(36px, 4.6vw, 54px); font-weight: 650; letter-spacing: -1.7px; line-height: 1.3; margin: 22px 0 18px; }
.title-comma { margin-left: -5px; }
.title-period { color: var(--accent); }
.mobile-break { display: none; }
.intro-description { color: var(--muted); font-size: 15px; letter-spacing: 2px; margin: 0; line-height: 1.8; }
.intro-decoration { width: 220px; height: 175px; position: absolute; right: 26px; top: 54px; }
.decoration-grid { position: absolute; inset: 0; background-image: radial-gradient(var(--subtle) .7px, transparent .7px); background-size: 15px 15px; opacity: .18; mask-image: radial-gradient(ellipse at center, #000 15%, transparent 70%); }
.decoration-tile { position: absolute; display: grid; place-items: center; border-radius: 23px; border: 1px solid var(--border); box-shadow: var(--shadow); }
.tile-back { width: 76px; height: 76px; top: 37px; left: 30px; transform: rotate(-13deg); background: var(--surface); color: var(--blue); }
.tile-back .icon { width: 29px; height: 29px; stroke-width: 1.2; }
.tile-front { width: 86px; height: 86px; top: 64px; left: 98px; transform: rotate(12deg); background: var(--blue-soft); color: var(--blue); }
.tile-front svg { width: 40px; height: 40px; }
.decoration-dot { position: absolute; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); top: 22px; left: 147px; }
.decoration-plus { position: absolute; bottom: 13px; left: 44px; color: var(--subtle); font-size: 21px; font-weight: 300; }
.section-heading { display: flex; justify-content: space-between; align-items: center; margin-bottom: 21px; gap: 12px; }
.section-title { display: flex; align-items: center; gap: 10px; }
.section-title > .icon { width: 17px; height: 17px; color: var(--muted); }
h2 { margin: 0; font-size: 15px; font-weight: 600; letter-spacing: .5px; }
.tool-count { min-width: 23px; height: 21px; display: grid; place-items: center; border: 1px solid var(--border); border-radius: 6px; color: var(--muted); background: var(--surface); font-size: 11px; font-variant-numeric: tabular-nums; margin-left: 1px; }
.section-note { font-size: 12px; color: var(--subtle); letter-spacing: .6px; }
.empty-state { min-height: 345px; padding: 56px 24px; border: 1px solid var(--border); border-radius: 18px; background: var(--surface); display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }
.empty-illustration { width: 88px; height: 88px; color: var(--subtle); margin-bottom: 15px; }
.empty-illustration svg { display: block; width: 100%; height: 100%; }
.empty-icon-bg { fill: var(--empty-bg); }
.empty-spark { stroke: var(--accent); }
.empty-spark-dot { fill: var(--blue); opacity: .5; }
h3 { margin: 0; font-size: 16px; font-weight: 550; letter-spacing: 1px; }
.empty-state p { color: var(--muted); font-size: 12px; line-height: 1.8; letter-spacing: .5px; margin: 11px 0 20px; }
.empty-tag { display: inline-flex; align-items: center; gap: 6px; font-size: 10px; letter-spacing: 1px; color: var(--muted); background: var(--empty-bg); border-radius: 20px; padding: 6px 11px; }
.empty-tag span { width: 4px; height: 4px; background: var(--subtle); border-radius: 50%; }
.site-footer { margin-top: auto; }
.footer-inner { min-height: 80px; border-top: 1px solid var(--border); padding-top: 20px; padding-bottom: 20px; }
.footer-signature { display: flex; align-items: center; gap: 13px; color: var(--subtle); font-size: 11px; letter-spacing: .3px; }
.footer-mark { font-size: 17px; font-weight: 750; letter-spacing: -1px; color: var(--muted); }
.footer-domain { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 11px; color: var(--subtle); letter-spacing: .3px; }
.footer-domain span { margin-left: 7px; color: var(--accent); }
.category-heading { display: flex; align-items: center; gap: 9px; border-top: 1px solid var(--border); padding-top: 26px; margin-top: 24px; margin-bottom: 19px; }
.category-heading h3 { font-size: 13px; letter-spacing: .3px; font-weight: 600; }
.category-heading > span:last-child { color: var(--subtle); font-size: 10px; margin-left: 3px; }
.category-dot { width: 6px; height: 6px; background: #73958c; border-radius: 50%; }
.tool-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.tool-card { display: flex; align-items: flex-start; gap: 17px; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 25px; transition: border-color .2s, transform .2s, box-shadow .2s; }
.tool-card:hover { border-color: var(--blue); transform: translateY(-3px); box-shadow: var(--shadow); }
.tool-card-icon { display: grid; place-items: center; flex-shrink: 0; width: 44px; height: 44px; border-radius: 13px; background: var(--blue-soft); color: var(--blue); }
.tool-card-icon .icon { width: 22px; height: 22px; }
.tool-card-text { display: flex; flex-direction: column; min-width: 0; gap: 11px; padding-top: 3px; }
.tool-card-text strong { font-size: 15px; font-weight: 550; }
.tool-card-text > span { color: var(--muted); font-size: 11px; line-height: 1.8; }
.tool-card-text .tool-card-formats { font-size: 8px; color: var(--subtle); letter-spacing: .8px; margin-top: 6px; }
.tool-card-arrow { margin-left: auto; color: var(--subtle); font-size: 18px; }
@media (min-width: 1440px) { .intro { padding-top: 100px; padding-bottom: 80px; } .intro-decoration { top: 78px; } .empty-state { min-height: 375px; } }
@media (max-width: 700px) {
  .site-header { height: 73px; }
  .header-inner, .footer-inner { padding-left: 24px; padding-right: 24px; }
  .main-content { padding: 0 24px 56px; }
  .brand { gap: 11px; }
  .brand-mark { width: 36px; height: 36px; font-size: 18px; border-radius: 11px; }
  .brand-name { font-size: 15px; gap: 10px; }
  .personal-label, .action-divider { display: none; }
  .intro { padding: 57px 0 48px; }
  .eyebrow { font-size: 8px; letter-spacing: 1.4px; gap: 8px; }
  .accent-line { width: 16px; }
  h1 { font-size: 38px; letter-spacing: -1.5px; margin-top: 20px; }
  .intro-description { font-size: 13px; letter-spacing: 1px; }
  .intro-decoration { display: none; }
  .section-note { display: none; }
  .empty-state { min-height: 330px; border-radius: 14px; }
  .footer-inner { gap: 12px; flex-wrap: wrap; }
  .footer-signature { font-size: 10px; gap: 9px; }
  .footer-domain { font-size: 10px; }
  .tool-grid { grid-template-columns: minmax(0, 1fr); }
  .tool-card { padding: 21px; gap: 13px; }
  .tool-card-text strong { font-size: 14px; }
}
@media (max-width: 360px) {
  .header-inner, .footer-inner { padding-left: 20px; padding-right: 20px; }
  .main-content { padding-left: 20px; padding-right: 20px; }
  .brand-english, .brand-divider { display: none; }
  .eyebrow { letter-spacing: .8px; }
  h1 { font-size: 34px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; } }