:root {
  --orange: #ff6a1f;
  --orange-light: #ff8558;
  --ink: #11110f;
  --white: #fffdfa;
  --line-light: rgba(255, 253, 250, .22);
  --line-dark: rgba(17, 17, 15, .22);
  --mono: "Times New Roman", "Microsoft YaHei", "Noto Sans CJK SC", serif;
  --sans: "Times New Roman", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  --pad: clamp(1.2rem, 4vw, 4.5rem);
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--ink); scroll-behavior: smooth; }
body { min-height: 100vh; margin: 0; font-family: var(--sans); }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.page-header { position: fixed; z-index: 10; top: 0; left: 50%; display: flex; width: min(100%, 1440px); align-items: center; justify-content: space-between; padding: 1.1rem var(--pad); color: var(--ink); transform: translateX(-50%); }
.skills-page .page-header, .contact-page .page-header { color: #fffdfa; }
.skills-page .page-header, .contact-page .page-header { justify-content: flex-end; }
.name-slot { display: flex; align-items: center; width: clamp(7rem, 12vw, 11rem); min-height: 1.8rem; border-bottom: 1px solid currentColor; font-family: var(--mono); font-size: .76rem; letter-spacing: .1em; }
.name-slot span { display: block; width: 100%; height: 1px; }
.name-visible { width: auto; border-bottom: 0; font-size: .85rem; font-weight: 600; }
.page-nav { display: flex; gap: clamp(1.2rem, 2.7vw, 3rem); color: currentColor; font-size: .78rem; }
.page-nav a { opacity: .86; transition: color .25s ease, opacity .25s ease; }
.page-nav a:hover { opacity: 1; }
.page-nav a.is-active { color: var(--orange); opacity: 1; }
.skills-page .page-header .page-nav, .contact-page .page-header .page-nav { color: #fffdfa; }
.skills-page .page-header .page-nav a, .contact-page .page-header .page-nav a { color: #fffdfa; opacity: 1; }
.skills-page .page-header .page-nav a:hover, .contact-page .page-header .page-nav a:hover { color: #ff6a1f; }
.skills-page .page-header .page-nav a.is-active, .contact-page .page-header .page-nav a.is-active { color: #ff6a1f; }
.menu-toggle { display: none; width: 2.2rem; height: 2.2rem; padding: .4rem; border: 0; background: transparent; }
.menu-toggle i { display: block; height: 1px; margin: .35rem 0; background: currentColor; }

.cover-page { background: var(--orange); color: var(--ink); }
.cover-main { position: relative; min-height: 100vh; overflow: hidden; background: var(--orange); }
.cover-background { position: absolute; inset: 0; background: url("assets/hero-orange-gradient.png") center/cover; }
.cover-frame { position: absolute; z-index: 1; top: clamp(5.5rem, 9vw, 8.5rem); right: 0; left: 0; height: clamp(22rem, 49vh, 32rem); background: var(--ink); }
.cover-image { position: absolute; z-index: 2; top: clamp(5.5rem, 9vw, 8.5rem); left: 0; width: clamp(18rem, 29vw, 28rem); height: clamp(22rem, 49vh, 32rem); }
.cover-image img { width: 100%; height: 100%; object-fit: cover; filter: contrast(1.12) saturate(.7); }

.skills-page { background: #10100f; color: var(--white); }
.skills-main, .contact-main { position: relative; width: min(100%, 1440px); min-height: 100vh; margin: 0 auto; padding: clamp(7rem, 12vw, 10rem) var(--pad) clamp(4rem, 8vw, 7rem); }
.page-index { position: absolute; top: clamp(6rem, 9vw, 8rem); left: var(--pad); color: rgba(255, 253, 250, .58); font-family: var(--mono); font-size: .65rem; letter-spacing: .12em; }
.skills-intro { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 8vw, 10rem); align-items: end; padding-top: clamp(4rem, 12vw, 10rem); }
.kicker { margin: 0 0 1.3rem; font-family: var(--mono); font-size: .67rem; letter-spacing: .15em; opacity: .64; }
.skills-intro h1, .contact-intro h1 { margin: 0; font-size: clamp(3.8rem, 9vw, 10rem); font-weight: 300; line-height: .86; letter-spacing: -.09em; }
.skills-intro h1 strong { font-weight: 700; }
.skills-description { max-width: 25rem; margin: 0 0 .5rem; color: rgba(255, 253, 250, .64); font-size: 1rem; line-height: 1.8; }
.skills-list { max-width: 78rem; margin-top: clamp(7rem, 13vw, 13rem); border-top: 1px solid var(--line-light); }
.skill-item { display: grid; grid-template-columns: 5rem 1fr 2.5rem; gap: 1.2rem; align-items: center; padding: 1.25rem 0; border-bottom: 1px solid var(--line-light); font-family: var(--mono); }
.skill-name { font-size: 1.3rem; }
.skill-line { height: 2px; background: rgba(255, 253, 250, .2); }
.skill-line i { display: block; width: var(--skill-level); height: 100%; background: var(--orange); }
.skill-value { color: rgba(255, 253, 250, .58); font-size: .7rem; text-align: right; }

.contact-page { background: var(--ink); color: var(--white); }
.contact-main { display: flex; min-height: 100vh; flex-direction: column; justify-content: space-between; }
.contact-main { padding-top: 0; }
.contact-intro { padding-top: clamp(7rem, 11vw, 9rem); }
.contact-intro h1 { margin: 0 0 1.8rem; color: var(--orange-light); font-size: clamp(4rem, 9vw, 9rem); font-weight: 300; line-height: .8; letter-spacing: -.1em; }
.contact-cta { display: inline-flex; gap: 1rem; margin-top: 3rem; padding-bottom: .7rem; border-bottom: 1px solid var(--white); font-family: var(--mono); font-size: .85rem; }
.contact-cta span { font-size: 1.1rem; }
.contact-details { width: min(100%, 38rem); margin: 5rem 0 0 auto; border-top: 1px solid var(--line-light); }
.contact-details div { display: flex; justify-content: space-between; gap: 2rem; padding: 1rem 0; border-bottom: 1px solid var(--line-light); font-family: var(--mono); font-size: .72rem; }
.contact-details span { color: rgba(255, 253, 250, .52); }
.contact-details strong, .contact-details a { font-weight: 400; text-align: right; }
.contact-footer { display: flex; justify-content: space-between; gap: 1rem; padding-top: 1rem; border-top: 1px solid var(--line-light); font-family: var(--mono); font-size: .64rem; letter-spacing: .08em; color: rgba(255, 253, 250, .58); }

@media (max-width: 760px) {
  .page-nav { position: fixed; inset: 0; display: flex; flex-direction: column; justify-content: center; gap: 1.2rem; padding: 5rem var(--pad); background: var(--ink); color: var(--white); transform: translateY(-100%); transition: transform .3s ease; }
  .page-nav.is-open { transform: translateY(0); }
  .page-nav a { font-size: 1.1rem; }
  .menu-toggle { display: block; position: relative; z-index: 2; }
  .skills-page .page-nav, .contact-page .page-nav { position: static; inset: auto; display: flex; flex-direction: row; justify-content: flex-end; gap: .7rem; padding: 0; background: transparent; color: #fffdfa; transform: none; }
  .skills-page .page-nav a, .contact-page .page-nav a { font-size: .66rem; }
  .skills-page .menu-toggle, .contact-page .menu-toggle { display: none; }
  .skills-intro { grid-template-columns: 1fr; gap: 2rem; padding-top: 4rem; }
  .skills-description { margin: 0; }
  .contact-details { margin-top: 4rem; }
}

@media (max-width: 480px) {
  .cover-frame, .cover-image { top: 7rem; height: 20rem; }
  .cover-image { width: 70vw; }
  .page-nav { gap: 1rem; }
  .skills-intro h1, .contact-intro h1 { font-size: clamp(3.8rem, 18vw, 6rem); }
  .skill-item { grid-template-columns: 3.5rem 1fr 2rem; gap: .7rem; }
  .contact-details { margin-top: 3rem; }
  .contact-details div, .contact-footer { flex-direction: column; gap: .45rem; }
  .contact-details strong, .contact-details a { text-align: left; }
}