@import url('variables.css');

/* Reset */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; transition: background 0.4s ease, color 0.4s ease; }
body { font-family: var(--font-family); background: var(--color-bg); color: var(--color-text); line-height: 1.5; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ===== Navigation ===== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-height);
  display: flex; align-items: center; justify-content: center;
  background: var(--color-nav-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}
.nav--scrolled {
  background: var(--color-nav-bg-scrolled);
}
.nav__inner {
  width: 100%; max-width: var(--content-wide-width);
  padding: 0 32px;
  display: flex; align-items: center; gap: 36px;
}
.nav__logo {
  font-size: 20px; font-weight: 400;
  letter-spacing: 0.2em;
  display: flex; align-items: center; gap: 10px;
}
.nav__logo-img {
  height: 28px; width: auto;
}
.nav__logo .brand {
  background: linear-gradient(135deg, #4862FF, #6C8CFF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav__logo .dot { margin: 0 3px; color: var(--color-text-secondary); }
.nav__logo .product { color: var(--color-orange); }
.nav__links { display: flex; gap: 36px; margin-left: auto; }
.nav__links a {
  font-size: var(--font-size-small); color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}
.nav__links a:hover { color: var(--color-text); }

/* Theme Toggle - Side Tab */
.theme-toggle {
  position: fixed; right: 0; top: 50%; transform: translateY(-50%);
  z-index: 90; display: flex; flex-direction: column; align-items: center;
  gap: 6px; padding: 12px 10px;
  background: var(--color-nav-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: 1px solid var(--color-border); border-right: none;
  border-radius: 10px 0 0 10px;
  cursor: pointer; opacity: 0.5;
  transition: all 0.3s ease;
}
.theme-toggle:hover {
  opacity: 1; transform: translateY(-50%) translateX(-4px);
}
.theme-toggle__icon {
  width: 18px; height: 18px; display: block;
}
.theme-toggle__icon svg {
  width: 100%; height: 100%; stroke: var(--color-text-secondary);
  fill: none; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round;
  transition: stroke var(--transition-fast);
}
.theme-toggle:hover .theme-toggle__icon svg { stroke: var(--color-text); }
.theme-toggle__label {
  font-size: 11px; color: var(--color-text-secondary); writing-mode: vertical-rl;
  letter-spacing: 0.08em; white-space: nowrap;
  transition: color var(--transition-fast);
}
.theme-toggle:hover .theme-toggle__label { color: var(--color-text); }

.nav__cta {
  font-size: var(--font-size-small); color: var(--color-white);
  background: linear-gradient(135deg, #4862FF, #6C8CFF); padding: 8px 22px;
  border-radius: var(--radius-button);
  transition: opacity var(--transition-fast);
}
.nav__cta:hover { opacity: 0.85; }

/* Hamburger */
.nav__hamburger {
  display: none; flex-direction: column; gap: 5px; cursor: pointer;
}
.nav__hamburger span {
  width: 20px; height: 1.5px; background: var(--color-text);
  transition: var(--transition-fast);
}

/* Mobile Menu */
.mobile-menu {
  display: none; position: fixed; inset: 0; z-index: 99;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(20px);
  flex-direction: column; align-items: center; justify-content: center; gap: 32px;
}
.mobile-menu.active { display: flex; }
.mobile-menu a {
  font-size: 28px; font-weight: 600; color: var(--color-text);
  transition: color var(--transition-fast);
}
.mobile-menu a:hover { color: var(--color-blue); }

/* ===== Hero ===== */
.hero {
  min-height: 100vh; display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center;
  padding: calc(var(--nav-height) + 40px) 24px 80px;
  background: var(--color-bg);
  position: relative; overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: var(--hero-bg-opacity); z-index: 0;
}
.hero::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, var(--color-hero-overlay-center) 0%, var(--color-hero-overlay) 70%);
  z-index: 1;
}
.hero__title, .hero__subtitle, .hero__actions { position: relative; z-index: 2; }
.hero__title {
  font-size: var(--font-size-hero); font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  line-height: 1.05; margin-bottom: 16px;
}
.hero__subtitle {
  font-size: var(--font-size-subtitle); font-weight: 400;
  color: var(--color-text-secondary); max-width: 600px; margin-bottom: 40px;
}
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 12px 28px; border-radius: var(--radius-button);
  font-size: var(--font-size-body); font-weight: 500;
  transition: all var(--transition-fast);
}
.btn--primary { background: linear-gradient(135deg, #4862FF, #6C8CFF); color: var(--color-white); }
.btn--primary:hover { opacity: 0.85; }
.btn--secondary { background: transparent; color: var(--color-blue); }
.btn--secondary:hover { text-decoration: underline; }
.btn--secondary::after { content: '→'; transition: transform var(--transition-fast); }
.btn--secondary:hover::after { transform: translateX(4px); }
.btn--white { background: var(--color-white); color: var(--color-black); }
.btn--white:hover { background: var(--color-light-gray); }

/* ===== Sections ===== */
.section {
  padding: var(--section-padding) 24px;
  max-width: var(--content-wide-width);
  margin: 0 auto;
}
.section--full { max-width: 100%; }
.section--dark { background: var(--color-bg); }
.section--light { background: var(--color-light-gray); color: var(--color-dark); }
.section__header {
  text-align: center; margin-bottom: 64px;
}
.section__title {
  font-size: var(--font-size-section-title); font-weight: 700;
  letter-spacing: var(--letter-spacing-tight); line-height: 1.1;
  margin-bottom: 12px;
}
.section__subtitle {
  font-size: var(--font-size-subtitle); color: var(--color-text-secondary);
  font-weight: 400;
}
.section--light .section__subtitle { color: #6E6E73; }

/* ===== Industry Cards (Homepage) ===== */
.industry-cards {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px;
  max-width: var(--content-max-width); margin: 0 auto;
}
.industry-card {
  position: relative; overflow: hidden;
  border-radius: var(--radius-card);
  min-height: 380px; display: flex; flex-direction: column;
  justify-content: flex-end; padding: 40px;
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
  cursor: pointer; text-align: left;
  background-size: cover; background-position: center;
}
.industry-card::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.1) 0%, rgba(0,0,0,0.75) 100%);
  transition: opacity var(--transition-normal);
}
.industry-card:hover {
  border-color: var(--card-hover-border);
}
.industry-card:hover .industry-card__img {
  transform: scale(1.05);
}
.industry-card__img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; transition: transform var(--transition-normal);
  z-index: 0;
}
.industry-card__title {
  font-size: 32px; font-weight: 700; margin-bottom: 8px;
  letter-spacing: var(--letter-spacing-tight);
  position: relative; z-index: 1;
}
.industry-card__desc {
  font-size: var(--font-size-body); color: rgba(255,255,255,0.8);
  margin-bottom: 20px; position: relative; z-index: 1;
}
.industry-card__link {
  font-size: var(--font-size-body); color: var(--color-blue);
  display: inline-flex; align-items: center; gap: 4px;
  position: relative; z-index: 1;
}
.industry-card__link::after { content: '→'; transition: transform var(--transition-fast); }
.industry-card:hover .industry-card__link::after { transform: translateX(4px); }

/* ===== Stats ===== */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px;
  max-width: var(--content-max-width); margin: 0 auto;
  text-align: center;
}
.stat__number {
  font-size: var(--font-size-number); font-weight: 700;
  letter-spacing: var(--letter-spacing-tight); line-height: 1;
  margin-bottom: 8px;
}
.section--light .stat__number { color: var(--color-dark); }
.stat__label {
  font-size: var(--font-size-body); color: var(--color-text-secondary);
}

/* ===== Tab Navigation ===== */
.tabs {
  position: sticky; top: var(--nav-height); z-index: 50;
  background: var(--color-tab-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-border);
  padding: 0 24px;
}
.tabs__inner {
  max-width: var(--content-wide-width); margin: 0 auto;
  display: flex; gap: 0; overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.tabs__inner::-webkit-scrollbar { display: none; }
.tab-btn {
  padding: 14px 24px; font-size: var(--font-size-small);
  color: var(--color-text-secondary); white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}
.tab-btn:hover { color: var(--color-text); }
.tab-btn.active {
  color: var(--color-text);
  border-bottom-color: var(--color-text);
}

/* ===== Skill Cards Grid ===== */
.skills-grid {
  max-width: var(--content-wide-width); margin: 0 auto;
  padding: 48px 24px var(--section-padding);
}
.tab-content { display: none; }
.tab-content.active { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

.skill-card {
  background: var(--color-card-bg); border-radius: var(--radius-card);
  padding: 36px; border: 1px solid var(--color-border);
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  cursor: pointer;
}
.skill-card:hover {
  transform: translateY(-6px);
  border-color: transparent;
  box-shadow: 0 0 0 1px #4862FF, 0 12px 32px rgba(72, 98, 255, 0.2);
}
.skill-card:hover .skill-card__title { color: #6C8CFF; }
.skill-card__title {
  font-size: 22px; font-weight: 600;
  margin-bottom: 8px;
  transition: color 0.3s ease;
}
.skill-card__desc {
  font-size: 15px; color: var(--color-text-secondary);
  margin-bottom: 20px; line-height: 1.6;
}
.skill-card__abilities {
  list-style: none; margin-bottom: 20px;
}
.skill-card__abilities li {
  font-size: 15px; color: var(--ability-text);
  padding: 6px 0; padding-left: 16px; position: relative;
  line-height: 1.5;
}
.skill-card__abilities li::before {
  content: ''; position: absolute; left: 0; top: 13px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--color-blue);
}
.skill-card__tags { display: flex; gap: 8px; flex-wrap: wrap; }
.skill-tag {
  font-size: 12px; padding: 4px 12px;
  border-radius: var(--radius-tag);
  background: var(--color-input-bg);
  color: var(--color-text-secondary);
}
.skill-tag--beginner { color: #30D158; background: rgba(48, 209, 88, 0.1); }
.skill-tag--intermediate { color: #FF9F0A; background: rgba(255, 159, 10, 0.1); }
.skill-tag--advanced { color: #FF453A; background: rgba(255, 69, 58, 0.1); }

/* ===== CTA Section ===== */
.cta {
  text-align: center;
  padding: var(--section-padding) 24px;
  position: relative; overflow: hidden;
  background: var(--color-bg);
}
.cta__bg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: var(--hero-bg-opacity); z-index: 0;
}
.cta::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, var(--color-hero-overlay-center) 0%, var(--color-hero-overlay) 70%);
  z-index: 1;
}
.cta__title {
  font-size: var(--font-size-section-title); font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  margin-bottom: 16px; position: relative; z-index: 2;
}
.cta__subtitle {
  font-size: var(--font-size-subtitle); color: var(--color-text-secondary);
  margin-bottom: 40px; position: relative; z-index: 2;
}
.cta .fade-in { position: relative; z-index: 2; }

/* ===== Footer ===== */
.footer {
  background: var(--color-card-bg); color: var(--color-text-secondary);
  padding: 40px 24px 24px;
}
.footer__inner {
  max-width: var(--content-wide-width); margin: 0 auto;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 32px;
}
.footer__col h4 {
  font-size: 12px; font-weight: 600; color: var(--color-text);
  text-transform: uppercase; letter-spacing: 0.05em;
  margin-bottom: 12px;
}
.footer__col a {
  display: block; font-size: var(--font-size-small); color: var(--color-text-secondary);
  margin-bottom: 8px; transition: color var(--transition-fast);
}
.footer__col a:hover { color: var(--color-text); }
.footer__bottom {
  max-width: var(--content-wide-width); margin: 32px auto 0;
  padding-top: 16px; border-top: 1px solid var(--color-border);
  font-size: 12px; color: var(--color-text-secondary);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}

/* ===== Page Hero (Sub pages) ===== */
.page-hero {
  min-height: 50vh; display: flex; flex-direction: column;
  align-items: center; justify-content: center; text-align: center;
  padding: calc(var(--nav-height) + 60px) 24px 60px;
  background: var(--color-bg);
  position: relative; overflow: hidden;
}
.page-hero__bg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: var(--hero-bg-opacity); z-index: 0;
}
.page-hero::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, var(--color-hero-overlay-center) 0%, var(--color-hero-overlay) 70%);
  z-index: 1;
}
.page-hero__title {
  font-size: var(--font-size-hero); font-weight: 700;
  letter-spacing: var(--letter-spacing-tight); line-height: 1.05;
  margin-bottom: 12px; position: relative; z-index: 2;
}
.page-hero__subtitle {
  font-size: var(--font-size-subtitle); color: var(--color-text-secondary);
  position: relative; z-index: 2;
}

/* ===== Modal ===== */
.modal-overlay {
  display: none; position: fixed; inset: 0; z-index: 200;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  align-items: center; justify-content: center;
}
.modal-overlay.active { display: flex; }
.modal {
  background: var(--color-modal-bg); border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  padding: 48px 40px; width: 90%; max-width: 480px;
  position: relative;
}
.modal__close {
  position: absolute; top: 16px; right: 16px;
  color: var(--color-text-secondary); font-size: 24px; cursor: pointer;
  width: 32px; height: 32px; display: flex; align-items: center; justify-content: center;
  border-radius: 50%; transition: background var(--transition-fast);
}
.modal__close:hover { background: rgba(255,255,255,0.1); }
.modal__title {
  font-size: 28px; font-weight: 700; margin-bottom: 8px;
  letter-spacing: var(--letter-spacing-tight);
}
.modal__subtitle {
  font-size: 15px; color: var(--color-text-secondary); margin-bottom: 32px;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-size: 13px; color: var(--color-text-secondary);
  margin-bottom: 6px;
}
.form-group label .required { color: #FF453A; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%; padding: 12px 16px; font-size: 15px;
  background: var(--color-input-bg); border: 1px solid var(--color-border);
  border-radius: 10px; color: var(--color-text);
  font-family: var(--font-family); outline: none;
  transition: border-color var(--transition-fast);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-blue);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(255,255,255,0.25); }
.form-group select option { background: var(--color-modal-bg); color: var(--color-text); }
.form-group textarea { resize: vertical; min-height: 80px; }
.form-group .form-error {
  font-size: 12px; color: #FF453A; margin-top: 4px; display: none;
}
.form-group.error .form-error { display: block; }
.form-group.error input,
.form-group.error select { border-color: #FF453A; }
.form-submit {
  width: 100%; padding: 14px; font-size: 17px; font-weight: 600;
  background: linear-gradient(135deg, #4862FF, #6C8CFF); color: var(--color-white);
  border: none; border-radius: var(--radius-button); cursor: pointer;
  transition: opacity var(--transition-fast);
}
.form-submit:hover { opacity: 0.85; }
.form-success {
  display: none; text-align: center; padding: 40px 0;
}
.form-success__icon { font-size: 48px; margin-bottom: 16px; }
.form-success__title { font-size: 22px; font-weight: 600; margin-bottom: 8px; }
.form-success__desc { font-size: 15px; color: var(--color-text-secondary); }

/* Radio Group */
.radio-group { display: flex; gap: 12px; flex-wrap: wrap; }
.radio-group input[type="radio"] { display: none; }
.radio-group label {
  padding: 10px 24px; font-size: 15px; color: var(--color-text-secondary);
  background: var(--color-input-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-button); cursor: pointer;
  transition: all var(--transition-fast);
}
.radio-group label:hover { border-color: var(--card-hover-border); color: var(--color-text); }
.radio-group input[type="radio"]:checked + label {
  background: linear-gradient(135deg, #4862FF, #6C8CFF);
  border-color: #4862FF;
  color: var(--color-white);
}

/* Category Label (for "全部" tab) */
.skill-card__category {
  font-size: 12px; font-weight: 600; color: var(--color-blue);
  text-transform: uppercase; letter-spacing: 0.05em;
  margin-bottom: 10px;
  padding: 4px 12px; background: rgba(30,111,255,0.1);
  border-radius: var(--radius-tag); display: inline-block;
}

/* ===== Admin Page ===== */
.admin-page {
  min-height: 100vh; padding: calc(var(--nav-height) + 40px) 24px 80px;
  max-width: var(--content-wide-width); margin: 0 auto;
}
.admin-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 32px; flex-wrap: wrap; gap: 16px;
}
.admin-header h1 { font-size: 32px; font-weight: 700; }
.admin-actions { display: flex; gap: 12px; }
.admin-table {
  width: 100%; border-collapse: collapse;
  background: var(--color-card-bg); border-radius: var(--radius-card);
  overflow: hidden;
}
.admin-table th {
  padding: 14px 16px; text-align: left; font-size: 13px;
  color: var(--color-text-secondary); background: var(--color-input-bg);
  border-bottom: 1px solid var(--color-border);
}
.admin-table td {
  padding: 14px 16px; font-size: 14px;
  border-bottom: 1px solid var(--color-border);
}
.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover td { background: var(--color-input-bg); }
.admin-empty {
  text-align: center; padding: 80px 24px; color: var(--color-text-secondary);
  font-size: 17px;
}
.admin-count {
  font-size: 14px; color: var(--color-text-secondary); margin-bottom: 16px;
}

/* ===== Scroll Animations ===== */
.fade-in {
  opacity: 0; transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .industry-cards { grid-template-columns: 1fr; max-width: 500px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .tab-content.active { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__cta { display: none; }
  .nav__hamburger { display: flex; }
  .tab-content.active { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .footer__inner { flex-direction: column; }
  .footer__bottom { flex-direction: column; text-align: center; }
  .theme-toggle { padding: 14px 12px; }
  .theme-toggle__label { font-size: 12px; }
  .theme-toggle__icon { width: 20px; height: 20px; }
  .admin-header { flex-direction: column; align-items: flex-start; }
  .admin-header h1 { font-size: 24px; }
  .admin-actions { width: 100%; }
  .admin-actions .btn { flex: 1; text-align: center; font-size: 14px; padding: 10px 12px; }
}

/* ===== Admin Cards (Mobile) ===== */
.admin-cards { display: flex; flex-direction: column; gap: 12px; }
.admin-card {
  background: var(--color-card-bg); border-radius: var(--radius-card);
  border: 1px solid var(--color-border); padding: 20px; overflow: hidden;
}
.admin-card__header {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 14px; padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}
.admin-card__seq {
  font-size: 12px; color: var(--color-blue); font-weight: 600;
  background: rgba(30,111,255,0.1); padding: 2px 8px; border-radius: var(--radius-tag);
}
.admin-card__name { font-size: 17px; font-weight: 600; }
.admin-card__industry {
  margin-left: auto; font-size: 12px; color: var(--color-text-secondary);
  background: var(--color-input-bg); padding: 2px 10px; border-radius: var(--radius-tag);
}
.admin-card__row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 6px 0; font-size: 14px;
}
.admin-card__label { color: var(--color-text-secondary); }