/* ============================================================
   402 工作室网站 · 组件样式
   导航 / 按钮 / 标签 / 卡片 / 表单 / 浮层 / 光标 / 管理态
   ============================================================ */

/* ============ 导航 ============ */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: var(--z-nav);
  height: var(--nav-h);
  display: flex; align-items: center;
  transition: background var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
  border-bottom: 1px solid transparent;
}
.nav.is-solid {
  background: var(--c-paper);
  border-bottom-color: var(--c-line);
}
.nav.on-dark:not(.is-solid) { color: var(--c-on-dark); }
.nav__inner { display: flex; align-items: center; gap: var(--sp-5); width: 100%; }
.nav__logo { display: flex; align-items: center; gap: 10px; }
.nav__logo-mark { width: 15px; height: 15px; background: var(--c-red); flex: 0 0 auto; }
.nav__logo-name { font-family: var(--font-sans); font-weight: 800; font-size: 21px; letter-spacing: .03em; line-height: 1; color: var(--c-ink); }
.nav.on-dark:not(.is-solid) .nav__logo-name { color: var(--c-on-dark); }
.nav__logo-402 { color: var(--c-red); }
/* 导航链接组居中（logo 居左、语言/登录居右） */
.nav__links { position: absolute; left: 50%; transform: translateX(-50%); display: flex; align-items: center; gap: var(--sp-4); }
.nav__right { margin-left: auto; }
.nav__link {
  position: relative; font-size: 15px; padding: 6px 2px;
  transition: color var(--dur-fast) linear;
}
.nav__link.is-active { color: var(--c-red); }
.nav__link::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 100%;
  background: var(--c-red); transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-base) var(--ease-out);
}
.nav__link:hover::after, .nav__link.is-active::after { transform: scaleX(1); }
/* 语言切换：无框，当前语言红色高亮 */
.nav__lang { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .06em; }
.nav__lang button { display: inline-flex; align-items: center; justify-content: center; padding: 4px 2px; opacity: .45; transition: opacity var(--dur-fast) linear, color var(--dur-fast) linear; }
.nav__lang button.is-on { opacity: 1; color: var(--c-red); }
.nav__login {
  height: 34px; width: 94px; display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid currentColor; font-size: 13.5px; letter-spacing: .1em; text-indent: .1em; padding: 0;
  transition: background var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}
.nav__login:hover { background: var(--c-ink); border-color: var(--c-ink); color: var(--c-paper); }
.nav__user { display: inline-flex; align-items: center; gap: 12px; }
.nav__user-box {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 14px; letter-spacing: .06em; color: var(--c-red);
}
.nav__user-dot { width: 8px; height: 8px; background: var(--c-red); }
.nav__user-exit {
  height: 34px; display: inline-flex; align-items: center; position: relative;
  font-size: 15px; letter-spacing: .02em; color: var(--c-ink); padding: 0 2px;
}
.nav__user-exit::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 2px;
  background: var(--c-red); transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-base) var(--ease-out);
}
.nav__user-exit:hover { color: var(--c-ink); }
.nav__user-exit:hover::after { transform: scaleX(1); }

/* 移动端抽屉 */
.nav__burger { display: none; width: 40px; height: 40px; position: relative; }
.nav__burger span { position: absolute; left: 8px; right: 8px; height: 2px; background: currentColor; transition: transform var(--dur-base) var(--ease-inout), top var(--dur-base) var(--ease-inout); }
.nav__burger span:nth-child(1) { top: 14px; }
.nav__burger span:nth-child(2) { top: 24px; }
.nav.is-open .nav__burger span:nth-child(1) { top: 19px; transform: rotate(45deg); }
.nav.is-open .nav__burger span:nth-child(2) { top: 19px; transform: rotate(-45deg); }
.drawer {
  position: fixed; inset: 0; z-index: calc(var(--z-nav) - 1);
  background: var(--c-paper); padding: calc(var(--nav-h) + 32px) var(--margin) 40px;
  display: none; flex-direction: column; gap: var(--sp-3);
}
.drawer.is-open { display: flex; animation: drawerIn var(--dur-base) var(--ease-out); }
@keyframes drawerIn { from { opacity: 0; transform: translateY(10px); } }
.drawer a { font-family: var(--font-serif); font-size: 32px; font-weight: 700; border-bottom: 1px solid var(--c-line); padding-bottom: var(--sp-2); }
.drawer a:active { color: var(--c-red); }
@media (max-width: 900px) {
  .nav__links, .nav__login, .nav__user { display: none; }
  .nav__burger { display: block; }
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 26px; font-size: 14px; letter-spacing: .04em;
  border: 1px solid var(--c-ink); color: var(--c-ink); background: transparent;
  transition: background var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}
.btn:hover { background: var(--c-ink); color: var(--c-paper); }
.btn:active { background: var(--c-red-deep); border-color: var(--c-red-deep); color: #fff; }
.btn--primary { background: var(--c-red); border-color: var(--c-red); color: #fff; }
.btn--primary:hover { background: var(--c-ink); border-color: var(--c-ink); }
.btn--sm { padding: 7px 14px; font-size: 13px; }
.btn .arr { transition: transform var(--dur-base) var(--ease-out); }
.btn:hover .arr { transform: translateX(4px); }

/* ============ 标签 ============ */
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em;
  border: 1px solid var(--c-line); color: var(--c-ink-2); padding: 3px 9px;
}
.tag--red { border-color: var(--c-red); color: var(--c-red); }
.section--dark .tag { border-color: var(--line-dark); color: var(--c-on-dark-2); }
.section--dark .tag--red { border-color: var(--c-red); color: var(--c-red); }

/* ============ 项目卡片（作品看板 / 概览） ============ */
.pcard { position: relative; display: block; }
.pcard__imgwrap { overflow: hidden; aspect-ratio: 4 / 3; background: var(--c-paper-gray); }
.pcard__img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--dur-slow) var(--ease-out); }
.pcard:hover .pcard__img { transform: scale(1.035); }
.pcard__meta { display: flex; align-items: baseline; gap: 12px; margin-top: 12px; }
.pcard__no { font-family: var(--font-mono); font-size: 12px; color: var(--c-red); letter-spacing: .08em; }
.pcard__title { font-family: var(--font-serif); font-weight: 700; font-size: 17px; line-height: 1.4; transition: color var(--dur-fast) linear; }
.pcard:hover .pcard__title { color: var(--c-red); }
.pcard__sub { font-size: 12.5px; color: var(--c-ink-2); margin-top: 2px; }
.pcard__line { height: 1px; background: var(--c-line); margin-top: 12px; transform: scaleX(0); transform-origin: left; transition: transform var(--dur-slow) var(--ease-out); }
.pcard:hover .pcard__line { transform: scaleX(1); background: var(--c-red); }

/* ============ 筛选条 ============ */
.filterbar { display: flex; flex-wrap: wrap; gap: 6px 22px; align-items: center; }
.filterbar__btn {
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .08em;
  color: var(--c-ink-2); padding: 8px 2px; position: relative;
  transition: color var(--dur-fast) linear;
}
.filterbar__btn:hover { color: var(--c-ink); }
.filterbar__btn.is-on { color: var(--c-red); }
.filterbar__btn.is-on::after { content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 2px; background: var(--c-red); }
.searchbox { display: flex; align-items: center; gap: 8px; border-bottom: 1px solid var(--c-line); padding: 6px 2px; min-width: 220px; }
.searchbox input { border: 0; background: transparent; outline: none; width: 100%; font-size: 14px; }
.searchbox svg { flex: 0 0 auto; opacity: .5; }

/* ============ 表格（技术参数 / 工作台列表） ============ */
.spec-table { border-top: 1px solid var(--c-line); }
.spec-table__row { display: grid; grid-template-columns: 220px 1fr; border-bottom: 1px solid var(--c-line); }
.spec-table__k { font-family: var(--font-mono); font-size: 12px; letter-spacing: .06em; color: var(--c-ink-2); padding: 14px 16px 14px 0; }
.spec-table__v { padding: 14px 0; font-size: 15px; border-left: 0; }
.section--dark .spec-table { border-color: var(--line-dark); }
.section--dark .spec-table__row { border-color: var(--line-dark); }
.section--dark .spec-table__k { color: var(--c-on-dark-2); }
@media (max-width: 640px) { .spec-table__row { grid-template-columns: 1fr; } .spec-table__k { padding-bottom: 0; } }

/* ============ 表单 ============ */
.field { position: relative; margin-bottom: var(--sp-4); }
.field label { display: block; font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; color: var(--c-ink-2); margin-bottom: 6px; text-transform: uppercase; }
.field input, .field select, .field textarea {
  width: 100%; background: transparent; border: 0; border-bottom: 1px solid var(--c-line);
  padding: 10px 2px; outline: none; font-size: 15px;
}
.field::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 100%;
  background: var(--c-red); transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-base) var(--ease-out);
}
.field:focus-within::after { transform: scaleX(1); }
/* 触屏：输入字号 ≥16px，避免 iOS Safari 聚焦时强制放大页面 */
@media (pointer: coarse) {
  .field input, .field select, .field textarea, .searchbox input,
  .filter-select select, .lib-input { font-size: 16px; }
}

/* ============ Toast ============ */
.toast-root { position: fixed; left: 50%; bottom: calc(32px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%); z-index: var(--z-toast); display: flex; flex-direction: column; gap: 10px; align-items: center; }
.toast {
  background: var(--c-ink); color: var(--c-paper); font-size: 13.5px;
  border-left: 3px solid var(--c-red);
  padding: 12px 22px; box-shadow: 0 6px 24px rgba(17,17,17,.18);
  opacity: 0; transform: translateY(12px);
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
  max-width: min(90vw, 480px);
}
.toast.is-on { opacity: 1; transform: translateY(0); }

/* ============ 模态 ============ */
.modal {
  position: fixed; inset: 0; z-index: calc(var(--z-lightbox) + 10);
  display: flex; align-items: center; justify-content: center; padding: var(--sp-3);
}
.modal[hidden] { display: none; }
.modal__mask { position: absolute; inset: 0; background: rgba(17,17,17,.55); }
.modal__panel {
  position: relative; background: var(--c-paper); width: min(520px, 92vw);
  border-top: 3px solid var(--c-red); padding: var(--sp-5);
  max-height: 84vh; overflow: auto;
}
.modal__title { font-family: var(--font-serif); font-size: 20px; font-weight: 700; margin-bottom: var(--sp-2); }
.modal__body { font-size: 14px; color: var(--c-ink-2); line-height: 1.8; }
.modal__actions { display: flex; gap: 12px; margin-top: var(--sp-4); justify-content: flex-end; }
.modal code { font-family: var(--font-mono); font-size: 12px; background: var(--c-paper-gray); padding: 2px 6px; word-break: break-all; }

/* ============ 灯箱 ============ */
.lightbox {
  position: fixed; inset: 0; z-index: var(--z-lightbox);
  background: rgba(17, 17, 17, .96); color: var(--c-on-dark);
  display: flex; flex-direction: column;
}
.lightbox[hidden] { display: none; }
.lightbox__stage { flex: 1; display: flex; align-items: center; justify-content: center; min-height: 0; padding: 48px 72px; overflow: hidden; touch-action: none; }
.lightbox__img { max-width: 100%; max-height: 100%; object-fit: contain; will-change: transform; user-select: none; }
.lightbox__stage:not(.is-zoomed) .lightbox__img { cursor: zoom-in; }
.lightbox__stage.is-zoomed .lightbox__img { cursor: grab; }
.lightbox__stage.is-zoomed.is-dragging .lightbox__img { cursor: grabbing; }
.lightbox__zoomhint { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .06em; color: var(--c-on-dark-2); }
.lightbox__bar { display: flex; align-items: center; justify-content: space-between; padding: 14px var(--margin); border-top: 1px solid var(--line-dark); }
.lightbox__cap { font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em; color: var(--c-on-dark-2); }
.lightbox__count { font-family: var(--font-mono); font-size: 12px; color: var(--c-on-dark-2); }
.lightbox__count b { color: var(--c-red); font-weight: 500; }
.lightbox__nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 56px; height: 56px; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--line-dark); color: var(--c-on-dark);
  transition: background var(--dur-fast) linear, border-color var(--dur-fast) linear;
}
.lightbox__nav:hover { background: var(--c-red); border-color: var(--c-red); }
.lightbox__nav--prev { left: var(--margin); }
.lightbox__nav--next { right: var(--margin); }
.lightbox__close { position: absolute; top: 16px; right: var(--margin); font-family: var(--font-mono); font-size: 13px; letter-spacing: .1em; color: var(--c-on-dark-2); }
.lightbox__close:hover { color: var(--c-red); }
@media (max-width: 768px) { .lightbox__stage { padding: 40px 12px; } .lightbox__nav { display: none; } }
/* 触屏：手势替代箭头；关闭按钮给足热区 */
@media (pointer: coarse) {
  .lightbox__close { min-width: 44px; min-height: 44px; display: inline-flex; align-items: center; justify-content: center; }
}

/* ============ 管理态 ============ */
.admin-fab {
  position: fixed; right: var(--margin); bottom: calc(28px + env(safe-area-inset-bottom, 0px)); z-index: var(--z-admin);
  display: flex; flex-direction: column; gap: 8px; align-items: flex-end;
}
.admin-chip {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--c-red); color: var(--c-red); background: var(--c-paper);
  font-size: 12.5px; letter-spacing: .04em; padding: 8px 16px;
  transition: background var(--dur-fast) linear, color var(--dur-fast) linear;
}
.admin-chip:hover { background: var(--c-red); color: #fff; }
.admin-chip--solid { background: var(--c-red); color: #fff; }
.admin-chip--solid:hover { background: var(--c-red-deep); border-color: var(--c-red-deep); }
.admin-btn {
  display: none; font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em;
  border: 1px solid var(--c-red); color: var(--c-red); padding: 3px 10px;
}
.admin-btn:hover { background: var(--c-red); color: #fff; }
body[data-role="admin"] .admin-btn { display: inline-flex; }
body[data-role="admin"] .page { padding-bottom: 120px; }

/* ============ 页脚 ============ */
.footer { background: var(--c-bg-dark); color: var(--c-on-dark); padding: var(--sp-8) 0 var(--sp-4); }
.footer__slogan { font-family: var(--font-serif); font-weight: 900; font-size: clamp(30px, 4.2vw, 60px); line-height: 1.25; max-width: 20em; }
.footer__slogan em { font-style: normal; color: var(--c-red); }
.footer__grid { display: grid; grid-template-columns: 1fr auto; gap: var(--sp-5); margin-top: var(--sp-7); padding-top: var(--sp-4); border-top: 1px solid var(--line-dark); }
.footer__col h4 { font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em; color: var(--c-on-dark-2); margin-bottom: 12px; font-weight: 400; }
.footer__col p, .footer__col a { font-size: 14px; color: var(--c-on-dark); line-height: 2; }
.footer__col a:hover { color: var(--c-red); }
.footer__bottom { display: flex; flex-wrap: wrap; gap: 12px 32px; justify-content: space-between; margin-top: var(--sp-5); font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; color: var(--c-on-dark-2); }
.footer__bottom a { color: inherit; text-decoration: none; transition: color var(--dur-base) var(--ease-out); }
.footer__bottom a:hover { color: var(--c-red); }
.footer__top-btn { font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em; color: var(--c-on-dark-2); display: inline-flex; align-items: center; gap: 8px; }
.footer__top-btn:hover { color: var(--c-red); }
@media (max-width: 768px) { .footer__grid { grid-template-columns: 1fr; } }