/* ============================================================
   masters.css —— 第 5 章「摄影师」悬浮小球 + 摄影师详情 + 知识库页
   ============================================================ */

/* ---------------- 章节里的悬浮小球层 ---------------- */

.masters-layer {
  position: fixed;
  inset: 0;
  z-index: 8;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .55s cubic-bezier(.22, .61, .36, 1);
}
.masters-layer.is-on { visibility: visible; }

.masters-head {
  position: absolute;
  padding: clamp(10px, 1.4vw, 18px);
  border-radius: 18px;
  left: clamp(20px, 3.4vw, 56px);
  top: clamp(84px, 13vh, 128px);
  width: min(36ch, 78vw);
  text-align: left;
  color: #f4f0e7;
  pointer-events: none;
  text-shadow: 0 2px 30px rgba(3, 9, 13, .55);
  transition: opacity .5s ease;
}
.masters-head::before {
  content: '';
  position: absolute;
  inset: -16px -22px;
  z-index: -1;
  border-radius: 24px;
  background: radial-gradient(ellipse at 18% 42%, rgba(5, 9, 12, .5), rgba(5, 9, 12, 0) 72%);
  pointer-events: none;
}
.masters-head__kicker {
  margin: 0 0 clamp(14px, 2.4vh, 24px);
  font-size: 9px;
  letter-spacing: .22em;
  color: rgba(244, 240, 231, .62);
}
.masters-head__title {
  margin: 0;
  font-size: clamp(26px, 3vw, 44px);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -.02em;
}
.masters-head__line {
  margin: clamp(12px, 2vh, 18px) 0 0;
  max-width: 32ch;
  font-size: clamp(11.5px, .92vw, 13.5px);
  line-height: 1.8;
  color: rgba(244, 240, 231, .72);
}
.masters-head__all {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: clamp(14px, 2.4vh, 22px);
  padding-bottom: 4px;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: rgba(244, 240, 231, .78);
  text-decoration: none;
  border-bottom: 1px solid rgba(244, 240, 231, .3);
  pointer-events: auto;
  transition: color .3s ease, border-color .3s ease;
}
.masters-head__all:hover { color: #fff; border-color: rgba(255, 255, 255, .7); }

.master-ball {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 999px;
  color: #f6f5f1;
  cursor: pointer;
  pointer-events: auto;
  will-change: transform;
  transform: translate(-50%, -50%);
  box-shadow:
    0 24px 46px -22px rgba(0, 0, 0, .7),
    inset 0 0 0 1px rgba(255, 255, 255, .18);
  -webkit-tap-highlight-color: transparent;
  transition: box-shadow .4s ease;
}
.master-ball::after {
  content: '';
  position: absolute;
  inset: -7px;
  border-radius: inherit;
  border: 1px solid rgba(246, 245, 241, .3);
  opacity: 0;
  transform: scale(.96);
  transition: opacity .35s ease, transform .45s cubic-bezier(.19, 1, .22, 1);
}
.master-ball:hover::after,
.master-ball:focus-visible::after { opacity: 1; transform: none; }
.master-ball:hover { box-shadow: 0 30px 60px -24px rgba(0, 0, 0, .75), inset 0 0 0 1px rgba(255, 255, 255, .3); }
.master-ball:focus-visible { outline: none; }

.master-ball__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
  opacity: .9;
}
.master-ball__mark {
  position: relative;
  z-index: 1;
  font-size: .34em;
  font-weight: 600;
  letter-spacing: .04em;
  text-shadow: 0 1px 12px rgba(0, 0, 0, .35);
}
.master-ball__name {
  position: absolute;
  left: 50%;
  top: calc(100% + 9px);
  transform: translateX(-50%) translateY(3px);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  white-space: nowrap;
  color: rgba(244, 240, 231, .78);
  opacity: 0;
  transition: opacity .3s ease, transform .35s ease;
  pointer-events: none;
}
.master-ball:hover .master-ball__name,
.master-ball:focus-visible .master-ball__name { opacity: 1; transform: translateX(-50%); }

/* ---------------- 摄影师详情面板 ---------------- */

.master-panel {
  position: fixed;
  inset: 0;
  z-index: 340;
  display: grid;
  place-items: center;
  padding: clamp(16px, 3vh, 34px) clamp(14px, 3vw, 40px);
  visibility: hidden;
}
.master-panel.is-open { visibility: visible; }
body.master-open { overflow: hidden; }

.master-card__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(14, 16, 19, .8);
  backdrop-filter: blur(14px) saturate(1.02);
  opacity: 0;
  transition: opacity .4s ease;
}
.master-panel.is-open .master-card__backdrop { opacity: 1; }

.master-card {
  position: relative;
  width: min(660px, 96vw);
  max-height: min(88vh, 920px);
  overflow-y: auto;
  padding: clamp(24px, 3vw, 40px);
  background: #f6f5f1;
  border: 1px solid rgba(20, 23, 26, .12);
  box-shadow: 0 70px 160px -70px rgba(0, 0, 0, .6);
  opacity: 0;
  transform: translateY(16px) scale(.995);
  transition: opacity .45s ease, transform .55s cubic-bezier(.19, 1, .22, 1);
}
.master-panel.is-open .master-card { opacity: 1; transform: none; }

.master-card__top {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 22px);
}
.master-card__disc {
  flex: none;
  width: clamp(64px, 7vw, 92px);
  height: clamp(64px, 7vw, 92px);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #f6f5f1;
  font-size: clamp(18px, 2vw, 26px);
  font-weight: 600;
  letter-spacing: .04em;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .2), 0 18px 34px -20px rgba(0, 0, 0, .6);
  overflow: hidden;
  position: relative;
}
.master-card__disc img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.master-card__name {
  margin: 0;
  font-size: clamp(24px, 2.6vw, 34px);
  font-weight: 500;
  letter-spacing: -.01em;
  line-height: 1.1;
}
.master-card__en {
  margin: 6px 0 0;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: rgba(20, 23, 26, .42);
}
.master-card__meta {
  margin: 5px 0 0;
  font-size: 11px;
  letter-spacing: .04em;
  color: rgba(20, 23, 26, .55);
}

.master-card__styles {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: clamp(20px, 3vh, 28px);
  padding: 0;
  list-style: none;
}
.master-card__styles li {
  padding: 5px 10px;
  border: 1px solid rgba(20, 23, 26, .16);
  border-radius: 999px;
  font-size: 9px;
  letter-spacing: .1em;
  color: rgba(20, 23, 26, .56);
}

.master-card__section {
  margin-top: clamp(22px, 3.4vh, 32px);
  padding-top: clamp(16px, 2.4vh, 22px);
  border-top: 1px solid rgba(20, 23, 26, .1);
}
.master-card__label {
  margin: 0 0 10px;
  font-size: 8.5px;
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: rgba(20, 23, 26, .36);
}
.master-card__bio {
  margin: 0;
  font-size: clamp(12.5px, 1vw, 14px);
  line-height: 2;
  color: rgba(20, 23, 26, .72);
}
.master-card__works {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.master-card__works li {
  display: flex;
  gap: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: rgba(20, 23, 26, .7);
}
.master-card__works li::before {
  content: '—';
  color: rgba(20, 23, 26, .28);
}

.master-card__credit {
  margin: clamp(16px, 2.4vh, 22px) 0 0;
  font-size: 8.5px;
  letter-spacing: .08em;
  color: rgba(20, 23, 26, .38);
}
.master-card__credit a { color: rgba(20, 23, 26, .5); text-decoration: none; border-bottom: 1px solid rgba(20, 23, 26, .18); }
.master-card__credit a:hover { color: var(--ink); border-bottom-color: rgba(20, 23, 26, .5); }

.master-card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: clamp(24px, 4vh, 34px);
}
.master-card__foot a,
.master-card__foot button {
  font: inherit;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(20, 23, 26, .55);
  background: none;
  border: 1px solid rgba(20, 23, 26, .18);
  border-radius: 999px;
  padding: 8px 13px;
  cursor: pointer;
  text-decoration: none;
  transition: color .25s ease, border-color .25s ease;
}
.master-card__foot a:hover,
.master-card__foot button:hover { color: var(--ink); border-color: rgba(20, 23, 26, .45); }

/* ---------------- 摄影师知识库页 ---------------- */

body.kb-page { background: var(--paper); }
body.kb-page, body.kb-page a, body.kb-page button,
body.kb-page input, body.kb-page textarea, body.kb-page select { cursor: auto; }
body.kb-page a[href], body.kb-page button, body.kb-page label { cursor: pointer; }

.kb-top {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  z-index: 120;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: clamp(16px, 2.4vh, 26px) clamp(20px, 4vw, 56px);
  background: linear-gradient(180deg, rgba(246, 245, 241, .96), rgba(246, 245, 241, .55) 70%, rgba(246, 245, 241, 0));
  pointer-events: none;
}
.kb-top > * { pointer-events: auto; }
.kb-top__brand { font-size: clamp(15px, 1.2vw, 18px); font-weight: 600; letter-spacing: .1em; color: var(--ink); text-decoration: none; }
.kb-top__brand sup { font-size: .42em; top: -.8em; letter-spacing: 0; }
.kb-top__nav { display: flex; gap: clamp(14px, 2vw, 28px); }
.kb-top__nav a { color: rgba(20, 23, 26, .52); text-decoration: none; transition: color .3s ease; }
.kb-top__nav a:hover, .kb-top__nav a.is-current { color: var(--ink); }
.kb-top__nav a span { font-size: 8px; letter-spacing: .18em; color: rgba(20, 23, 26, .3); }

.kb-main {
  max-width: 1560px;
  margin: 0 auto;
  padding: clamp(100px, 15vh, 170px) clamp(20px, 4vw, 56px) 0;
}

.kb-title {
  margin: 0;
  font-size: clamp(34px, 5.6vw, 84px);
  font-weight: 400;
  letter-spacing: -.035em;
  line-height: 1.02;
}
.kb-title span {
  display: block;
  margin-top: 12px;
  font-size: clamp(10px, .9vw, 12px);
  font-weight: 500;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: rgba(20, 23, 26, .4);
}
.kb-lede {
  margin: clamp(20px, 3vh, 30px) 0 0;
  max-width: 60ch;
  font-size: clamp(13px, 1.02vw, 15px);
  line-height: 1.95;
  color: rgba(20, 23, 26, .64);
}
.kb-tools {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: clamp(24px, 4vh, 38px);
}
.kb-add {
  padding: 10px 16px;
  border: 1px solid rgba(20, 23, 26, .22);
  border-radius: 999px;
  background: none;
  font: inherit;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(20, 23, 26, .6);
  cursor: pointer;
  transition: color .25s ease, border-color .25s ease, background .25s ease;
}
.kb-add:hover { color: var(--paper); background: var(--ink); border-color: var(--ink); }
.kb-note { font-size: 9px; letter-spacing: .08em; color: rgba(20, 23, 26, .36); }

.kb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: clamp(12px, 1.6vw, 22px);
  margin-top: clamp(30px, 5vh, 52px);
}
.kb-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding: clamp(16px, 1.6vw, 22px);
  border: 1px solid rgba(20, 23, 26, .1);
  border-radius: 3px;
  background: rgba(255, 255, 255, .38);
  text-align: left;
  font: inherit;
  cursor: pointer;
  transition: border-color .3s ease, background .3s ease, transform .35s ease;
}
.kb-card:hover { border-color: rgba(20, 23, 26, .3); background: rgba(255, 255, 255, .72); transform: translateY(-2px); }
.kb-card__disc {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #f6f5f1;
  font-size: 20px;
  font-weight: 600;
  overflow: hidden;
  position: relative;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .2);
}
.kb-card__disc img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.kb-card__name { margin: 0; font-size: 17px; font-weight: 500; letter-spacing: .01em; }
.kb-card__en { margin: 3px 0 0; font-size: 8.5px; letter-spacing: .18em; text-transform: uppercase; color: rgba(20, 23, 26, .38); }
.kb-card__meta { font-size: 10px; letter-spacing: .04em; color: rgba(20, 23, 26, .5); }
.kb-card__style { font-size: 9px; letter-spacing: .1em; color: rgba(20, 23, 26, .36); text-transform: uppercase; }

/* 添加摄影师表单 */
.kb-form-panel { position: fixed; inset: 0; z-index: 340; display: grid; place-items: center; padding: 20px; visibility: hidden; }
.kb-form-panel.is-open { visibility: visible; }
.kb-form-card {
  position: relative;
  width: min(620px, 96vw);
  max-height: 88vh;
  overflow-y: auto;
  padding: clamp(22px, 3vw, 34px);
  background: #f6f5f1;
  border: 1px solid rgba(20, 23, 26, .14);
  box-shadow: 0 70px 160px -70px rgba(0, 0, 0, .6);
}
.kb-form-card h2 { margin: 0 0 6px; font-size: 22px; font-weight: 500; }
.kb-form-card p { margin: 0 0 18px; font-size: 11px; line-height: 1.8; color: rgba(20, 23, 26, .5); }
.kb-field { display: flex; flex-direction: column; gap: 5px; margin-bottom: 12px; }
.kb-field span { font-size: 8.5px; letter-spacing: .16em; text-transform: uppercase; color: rgba(20, 23, 26, .4); }
.kb-field input, .kb-field textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid rgba(20, 23, 26, .16);
  border-radius: 2px;
  background: rgba(255, 255, 255, .6);
  font: inherit;
  font-size: 12px;
  color: var(--ink);
  outline: none;
}
.kb-field input:focus, .kb-field textarea:focus { border-color: rgba(20, 23, 26, .45); }
.kb-field textarea { min-height: 76px; resize: vertical; }
.kb-form-actions { display: flex; gap: 10px; margin-top: 18px; }
.kb-form-actions button {
  padding: 9px 15px;
  border-radius: 999px;
  border: 1px solid rgba(20, 23, 26, .2);
  background: none;
  font: inherit;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: rgba(20, 23, 26, .6);
  cursor: pointer;
}
.kb-form-actions button[type=submit] { color: var(--paper); background: var(--ink); border-color: var(--ink); }

@media (max-width: 760px) {
  .masters-head { top: 42%; }
  .master-ball__name { display: none; }
  .kb-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .kb-card { padding: 12px; }
  .kb-card__disc { width: 46px; height: 46px; font-size: 15px; }
}


@keyframes kbCardIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}
.kb-card {
  animation: kbCardIn .62s cubic-bezier(.22, .61, .36, 1) both;
  animation-delay: var(--card-i, 0ms);
}
@media (prefers-reduced-motion: reduce) {
  .kb-card { animation-duration: .3s; }
}


/* ---------------- 小球远去，成为星星 ---------------- */

.masters-stars {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity .3s linear;
  z-index: 2;
}
.masters-stars i {
  position: absolute;
  display: block;
  border-radius: 50%;
  background: #fdf8ec;
  box-shadow: 0 0 7px 1px rgba(255, 248, 230, .85), 0 0 18px 3px rgba(255, 240, 210, .35);
  animation: starTwinkle 3.4s ease-in-out infinite;
}
@keyframes starTwinkle {
  0%, 100% { opacity: .35; transform: scale(.8); }
  50% { opacity: 1; transform: scale(1.15); }
}

.master-ball.is-star {
  box-shadow:
    0 0 14px 3px rgba(255, 250, 236, .95),
    0 0 34px 9px rgba(255, 242, 212, .5) !important;
  filter: saturate(.85) brightness(1.08);
}
.master-ball.is-star::after { opacity: 0 !important; }

@media (prefers-reduced-motion: reduce) {
  .masters-stars i { animation: none; opacity: .8; }
}