/*
 * 维斯宣传页 · 第 10～16 段 + 一封信 + 页尾 的样式（独立于 site.css / motion.css）。
 * 演示卡全部复用 .viz / .art 画框，内部用 DOM + CSS @keyframes 手画、循环播放。
 * 配色只取 site.css 的令牌变量与黑白中性色、绿红状态色，不新增品牌色。
 * 响应式：1440 与 390 均不横向溢出；flex/grid 子项加 min-width:0，标题用 clamp()。
 */

/* ---------- 每段演示的循环时长（覆盖 motion.css 的 --loop 默认 8s） ---------- */
#phone .art   { --loop: 9s; }
#group .art   { --loop: 10s; }
#wecom .art   { --loop: 9s; }
#models .art  { --loop: 10s; }

/* ---------- 共享：客户端「员工正在做」看板（10/13 段复用） ---------- */
.sb-staff {
  display: flex; flex-direction: column; gap: 5px; min-width: 0;
  padding: 10px; border-radius: 12px;
  background: rgba(255, 255, 255, 0.03); border: 1px solid var(--line);
}
.sb-staff__head { display: flex; justify-content: space-between; align-items: center; font-size: 11px; color: var(--ink-2); }
.sb-staff__head b { font-size: 9px; letter-spacing: 0.12em; color: var(--ink-3); font-weight: 600; }
.sb-staff__row { display: flex; align-items: center; gap: 6px; font-size: 11px; color: var(--ink-3); min-width: 0; }
.sb-staff__row i { width: 6px; height: 6px; border-radius: 50%; background: var(--ink-3); flex: none; }
.sb-staff__row span { flex: none; }
.sb-staff__row em { margin-left: auto; font-style: normal; color: var(--ink-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sb-staff__row.is-run { color: var(--ink); }
.sb-staff__row.is-run i { background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.sb-staff__row.is-run em { color: var(--accent); }
.sb-staff__ready { margin-top: 3px; text-align: center; padding: 5px 0; border-radius: 8px; font-size: 11px; color: var(--ink-2); background: rgba(255, 255, 255, 0.04); border: 1px solid var(--line); }

/* ---------- 手机外框（11/13 段复用） ---------- */
.sb-phone {
  position: absolute; border-radius: 18px; overflow: hidden;
  background: #0c1220; border: 2px solid #1d2534;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
}
.sb-phone::before { content: ""; position: absolute; top: 7px; left: 50%; transform: translateX(-50%); width: 34%; height: 4px; border-radius: 2px; background: rgba(255, 255, 255, 0.12); z-index: 2; }

/* ================= 10 · 悬浮球 ================= */
.sb10-win {
  position: absolute; left: 27%; right: 27%; top: 15%; bottom: 15%;
  display: flex; flex-direction: column; min-width: 0;
  border-radius: 12px; overflow: hidden;
  background: #0b1120; border: 1px solid var(--line);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.5), 0 0 40px rgba(79, 195, 247, 0.06);
  animation: sb10-win var(--loop) cubic-bezier(0.22, 0.8, 0.24, 1) infinite both;
}
.sb10-win__bar { display: flex; align-items: center; gap: 6px; height: 26px; padding: 0 10px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, 0.03); font-size: 11px; color: var(--ink-2); flex: none; }
.sb10-win__bar i { width: 8px; height: 8px; border-radius: 50%; background: rgba(255, 255, 255, 0.16); }
.sb10-win__bar i:first-child { background: rgba(255, 255, 255, 0.26); }
.sb10-win__bar span { margin-left: auto; }
.sb10-win__bar em { font-style: normal; color: #6be3a0; font-size: 10px; }
.sb10-win__body { flex: 1; display: grid; grid-template-columns: 1.1fr 1fr; gap: 10px; padding: 12px; min-height: 0; min-width: 0; }
.sb10-chat { display: flex; flex-direction: column; gap: 9px; min-width: 0; }
.sb10-bubble { max-width: 88%; padding: 8px 11px; border-radius: 12px; font-size: 12px; line-height: 1.5; overflow-wrap: anywhere; }
.sb10-bubble--ai { align-self: flex-start; background: var(--bg-raise); border: 1px solid var(--line); color: var(--ink-2); }
.sb10-bubble--me { align-self: flex-end; background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.14); color: var(--ink); }

.sb10-ballwrap { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; opacity: 0; animation: sb10-ballwrap var(--loop) ease-out infinite both; }
.sb10-ball {
  position: relative; width: clamp(26px, 3.4vw, 40px); height: clamp(26px, 3.4vw, 40px); border-radius: 50%;
  background: radial-gradient(circle at 36% 32%, #ffffff 0%, #bfeaff 24%, #4fc3f7 58%, rgba(79, 195, 247, 0.3) 78%, transparent 80%);
  box-shadow: 0 0 22px rgba(79, 195, 247, 0.65), 0 0 60px rgba(79, 195, 247, 0.35);
}
.sb10-ball::before { content: ""; position: absolute; inset: -12px; border-radius: 50%; border: 1px solid rgba(79, 195, 247, 0.45); opacity: 0; animation: sb10-ring 2.2s ease-out infinite; }
.sb10-hint { position: absolute; left: 0; right: 0; bottom: 9%; text-align: center; font-size: 12px; color: var(--dim); opacity: 0; animation: sb10-hint var(--loop) ease-out infinite both; }

@keyframes sb10-win {
  0%, 14% { opacity: 1; transform: scale(1); }
  26%, 46% { opacity: 0; transform: scale(0.1); }
  58%, 100% { opacity: 1; transform: scale(1); }
}
@keyframes sb10-ballwrap {
  0%, 16% { opacity: 0; transform: scale(0.3); }
  26%, 48% { opacity: 1; transform: scale(1); }
  60%, 100% { opacity: 0; transform: scale(0.3); }
}
@keyframes sb10-hint { 0%, 18% { opacity: 0; } 28%, 46% { opacity: 1; } 58%, 100% { opacity: 0; } }
@keyframes sb10-ring { 0% { transform: scale(0.6); opacity: 0.8; } 100% { transform: scale(1.5); opacity: 0; } }

/* ================= 11 · 手机遥控 ================= */
.sb11-phone { left: 9%; top: 13%; width: 30%; height: 74%; }
.sb11-big {
  position: absolute; left: 50%; top: 54%; width: 58%; aspect-ratio: 1; margin: -29% 0 0 -29%;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  background: radial-gradient(circle at 40% 34%, rgba(79, 195, 247, 0.28), rgba(79, 195, 247, 0.06) 70%);
  border: 1.5px solid rgba(79, 195, 247, 0.55);
  animation: sb11-btn var(--loop) ease-in-out infinite both;
}
.sb11-big svg { width: 34%; height: 34%; }
.sb11-big__ring { position: absolute; inset: 0; border-radius: 50%; border: 1px solid var(--accent); opacity: 0; animation: sb11-ring var(--loop) ease-out infinite both; }

.sb11-pc { position: absolute; right: 8%; top: 12%; width: 50%; height: 76%; border-radius: 12px; background: #0b1120; border: 1px solid var(--line); overflow: hidden; box-shadow: 0 30px 70px rgba(0, 0, 0, 0.5); }
.sb11-pc__bar { position: absolute; top: 0; left: 0; right: 0; height: 24px; display: flex; align-items: center; gap: 6px; padding: 0 10px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, 0.03); }
.sb11-pc__bar i { width: 8px; height: 8px; border-radius: 50%; background: rgba(255, 255, 255, 0.16); }

.sb11-toast { position: absolute; left: 14%; display: flex; align-items: center; gap: 8px; padding: 8px 14px; border-radius: 10px; background: #0d1420; border: 1px solid var(--line); font-size: 12px; color: var(--txt); opacity: 0; }
.sb11-toast i { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.sb11-toast--mute { top: 30%; animation: sb11-mute var(--loop) ease-out infinite both; }
.sb11-toast--mute i { background: #ff5f5f; box-shadow: 0 0 10px rgba(255, 95, 95, 0.9); }
.sb11-toast--back { top: 46%; animation: sb11-back var(--loop) ease-out infinite both; }
.sb11-toast--back i { background: #6be3a0; box-shadow: 0 0 10px rgba(107, 227, 160, 0.9); }

@keyframes sb11-btn {
  0%, 12% { transform: scale(1); }
  16%, 21% { transform: scale(0.88); }
  26%, 50% { transform: scale(1); }
  54%, 59% { transform: scale(0.88); }
  64%, 100% { transform: scale(1); }
}
@keyframes sb11-ring {
  0%, 14% { opacity: 0; transform: scale(0.5); }
  20% { opacity: 0.9; }
  32% { opacity: 0; transform: scale(1.6); }
  48%, 50% { opacity: 0; transform: scale(0.5); }
  56% { opacity: 0.9; }
  68%, 100% { opacity: 0; transform: scale(1.6); }
}
@keyframes sb11-mute {
  0%, 22% { opacity: 0; transform: translateY(12px); }
  30%, 44% { opacity: 1; transform: none; }
  52%, 100% { opacity: 0; transform: translateY(12px); }
}
@keyframes sb11-back {
  0%, 50% { opacity: 0; transform: translateY(12px); }
  58%, 72% { opacity: 1; transform: none; }
  80%, 100% { opacity: 0; transform: translateY(12px); }
}

/* ================= 12 · 群聊 ================= */
.sb12 {
  position: absolute; left: 50%; top: 50%; width: 74%; height: 84%; transform: translate(-50%, -50%);
  display: flex; flex-direction: column; gap: 9px; padding: 12px; min-width: 0;
  border-radius: 14px; background: #0b1120; border: 1px solid var(--line);
}
.sb12__head { display: flex; align-items: center; gap: 7px; font-size: 12px; color: var(--ink-2); padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.sb12__dot { width: 7px; height: 7px; border-radius: 50%; background: #6be3a0; box-shadow: 0 0 8px rgba(107, 227, 160, 0.8); }
.sb12__msg { display: flex; gap: 9px; align-items: flex-start; min-width: 0; }
.sb12__ava { width: 28px; height: 28px; border-radius: 50%; flex: none; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 600; color: #031018; }
.sb12__ava.a1 { background: linear-gradient(135deg, #4fc3f7, #7ad3fb); }
.sb12__ava.a2 { background: linear-gradient(135deg, #7a9bff, #a9c0ff); }
.sb12__ava.a3 { background: linear-gradient(135deg, #6be3a0, #a8ecc4); }
.sb12__line { min-width: 0; display: flex; flex-direction: column; gap: 3px; }
.sb12__line b { font-size: 11px; font-weight: 600; color: var(--ink-3); }
.sb12__bubble { align-self: flex-start; max-width: 100%; padding: 7px 11px; border-radius: 12px; font-size: 12px; line-height: 1.5; color: var(--ink-2); background: var(--bg-raise); border: 1px solid var(--line); overflow-wrap: anywhere; }

.sb12__msg.m1 { animation: sb12-in1 var(--loop) ease-out infinite both; }
.sb12__msg.m2 { animation: sb12-in2 var(--loop) ease-out infinite both; }
.sb12__msg.m3 { animation: sb12-in3 var(--loop) ease-out infinite both; }
@keyframes sb12-in1 { 0%, 4% { opacity: 0; transform: translateY(10px); } 10%, 88% { opacity: 1; transform: none; } 94%, 100% { opacity: 0; transform: translateY(-6px); } }
@keyframes sb12-in2 { 0%, 32% { opacity: 0; transform: translateY(10px); } 38%, 88% { opacity: 1; transform: none; } 94%, 100% { opacity: 0; transform: translateY(-6px); } }
@keyframes sb12-in3 { 0%, 60% { opacity: 0; transform: translateY(10px); } 66%, 88% { opacity: 1; transform: none; } 94%, 100% { opacity: 0; transform: translateY(-6px); } }

/* ================= 13 · 企微通道 ================= */
.sb13-phone { left: 8%; top: 13%; width: 30%; height: 74%; }
.sb13-bubble { position: absolute; max-width: 82%; padding: 8px 12px; border-radius: 11px; font-size: 12px; line-height: 1.5; overflow-wrap: anywhere; }
.sb13-bubble--me { right: 9%; top: 16%; text-align: right; background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.14); color: var(--ink); animation: sb13-me var(--loop) ease-out infinite both; }
.sb13-bubble--ai { left: 9%; top: 42%; min-height: 34px; background: var(--bg-raise); border: 1px solid var(--line); color: var(--ink-2); }
.sb13-dots { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); display: inline-flex; gap: 4px; opacity: 0; animation: sb13-dots var(--loop) ease-out infinite both; }
.sb13-dots i { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); animation: sb13-dot 1s ease-in-out infinite; }
.sb13-dots i:nth-child(2) { animation-delay: 0.15s; }
.sb13-dots i:nth-child(3) { animation-delay: 0.3s; }
.sb13-reply { display: block; opacity: 0; animation: sb13-reply var(--loop) ease-out infinite both; }

.sb13-pc { position: absolute; right: 7%; top: 12%; width: 52%; height: 76%; border-radius: 12px; background: #0b1120; border: 1px solid var(--line); overflow: hidden; box-shadow: 0 30px 70px rgba(0, 0, 0, 0.5); }
.sb13-pc__bar { position: absolute; top: 0; left: 0; right: 0; height: 26px; display: flex; align-items: center; gap: 6px; padding: 0 10px; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, 0.03); font-size: 11px; color: var(--ink-2); }
.sb13-pc__bar i { width: 8px; height: 8px; border-radius: 50%; background: rgba(255, 255, 255, 0.16); }
.sb13-pc__bar span { margin-left: auto; }
.sb13-pc__body { position: absolute; inset: 26px 0 0 0; padding: 12px; }
.sb13-pc__body .sb-staff { height: 100%; }
.sb13-track { display: block; height: 6px; border-radius: 3px; background: rgba(255, 255, 255, 0.1); overflow: hidden; margin-top: 2px; }
.sb13-track i { display: block; height: 100%; width: 100%; background: var(--accent); animation: sb13-fill var(--loop) ease-in-out infinite both; }
.sb13-done { display: block; text-align: right; font-size: 11px; font-weight: 600; color: #6be3a0; opacity: 0; animation: sb13-done var(--loop) ease-out infinite both; }

@keyframes sb13-dot { 0%, 100% { opacity: 0.3; transform: translateY(0); } 50% { opacity: 1; transform: translateY(-3px); } }
@keyframes sb13-me { 0%, 6% { opacity: 0; transform: translateY(8px); } 12%, 88% { opacity: 1; transform: none; } 96%, 100% { opacity: 0; } }
@keyframes sb13-dots { 0%, 14% { opacity: 0; } 20%, 34% { opacity: 1; } 40%, 100% { opacity: 0; } }
@keyframes sb13-reply { 0%, 34% { opacity: 0; transform: translateY(8px); } 42%, 88% { opacity: 1; transform: none; } 96%, 100% { opacity: 0; } }
@keyframes sb13-fill { 0%, 16% { width: 0; } 56%, 88% { width: 100%; } 96%, 100% { width: 0; } }
@keyframes sb13-done { 0%, 58% { opacity: 0; transform: scale(0.5); } 66%, 88% { opacity: 1; transform: none; } 96%, 100% { opacity: 0; } }

/* ================= 14 · 模型 ================= */
.sb14 { position: absolute; left: 50%; top: 50%; width: 64%; transform: translate(-50%, -50%); display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.sb14__q { align-self: flex-end; max-width: 78%; padding: 9px 14px; border-radius: 12px; font-size: 13px; line-height: 1.5; color: var(--ink); background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.14); overflow-wrap: anywhere; }
.sb14__select { position: relative; height: 40px; border-radius: 999px; border: 1px solid rgba(79, 195, 247, 0.4); background: rgba(79, 195, 247, 0.06); }
.sb14__opt { position: absolute; inset: 0; display: flex; align-items: center; padding: 0 40px 0 16px; font-size: 13px; font-weight: 600; color: var(--accent); opacity: 0; }
.sb14__opt.o1 { opacity: 1; }
.sb14__caret { position: absolute; right: 16px; top: 50%; transform: translateY(-50%); color: var(--ink-3); font-size: 12px; }
.sb14__answer { display: grid; min-width: 0; padding: 12px 14px; border-radius: 12px; background: rgba(79, 195, 247, 0.08); border: 1px solid rgba(79, 195, 247, 0.22); }
.sb14__ans { grid-area: 1 / 1; font-size: 12.5px; line-height: 1.6; color: var(--ink-2); opacity: 0; overflow-wrap: anywhere; }
.sb14__ans.a1 { opacity: 1; }

.sb14__opt.o1 { animation: sb14-o1 var(--loop) ease-out infinite both; }
.sb14__opt.o2 { animation: sb14-o2 var(--loop) ease-out infinite both; }
.sb14__opt.o3 { animation: sb14-o3 var(--loop) ease-out infinite both; }
.sb14__ans.a1 { animation: sb14-o1 var(--loop) ease-out infinite both; }
.sb14__ans.a2 { animation: sb14-o2 var(--loop) ease-out infinite both; }
.sb14__ans.a3 { animation: sb14-o3 var(--loop) ease-out infinite both; }
@keyframes sb14-o1 { 0%, 2% { opacity: 0; } 8%, 28% { opacity: 1; } 34%, 100% { opacity: 0; } }
@keyframes sb14-o2 { 0%, 30% { opacity: 0; } 36%, 56% { opacity: 1; } 62%, 100% { opacity: 0; } }
@keyframes sb14-o3 { 0%, 58% { opacity: 0; } 64%, 84% { opacity: 1; } 90%, 100% { opacity: 0; } }

/* ================= 15 · 主题 ================= */
.sb15 { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; }
.sb15-card { width: 58%; max-width: 520px; border-style: solid; animation: sb15-card var(--loop) ease-in-out infinite both; }
.sb15-card__bar { display: flex; align-items: center; gap: 6px; height: 26px; padding: 0 10px; border-bottom: 1px solid rgba(0, 0, 0, 0.12); font-size: 11px; }
.sb15-card__bar i { width: 8px; height: 8px; border-radius: 50%; background: rgba(0, 0, 0, 0.3); animation: sb15-dot var(--loop) ease-in-out infinite both; }
.sb15-card__bar span { margin-left: auto; font-weight: 600; animation: sb15-txt var(--loop) ease-in-out infinite both; }
.sb15-card__body { display: flex; flex-direction: column; gap: 9px; padding: 14px; }
.sb15-bubble { max-width: 82%; padding: 8px 12px; font-size: 12px; line-height: 1.5; border-style: solid; }
.sb15-bubble--me { align-self: flex-end; animation: sb15-me var(--loop) ease-in-out infinite both; }
.sb15-bubble--ai { align-self: flex-start; animation: sb15-ai var(--loop) ease-in-out infinite both; }
.sb15-btn { align-self: flex-end; margin-top: 4px; padding: 6px 16px; font-size: 12px; font-weight: 600; animation: sb15-btn var(--loop) ease-in-out infinite both; }

.sb15-tag { position: absolute; top: 13%; font-size: 12px; font-weight: 600; padding: 5px 12px; border-radius: 999px; opacity: 0; }
.sb15-tag--a { left: 14%; color: #0a0f1c; background: #ffffff; border: 1px solid var(--line); opacity: 1; animation: sb15-t1 var(--loop) ease-out infinite both; }
.sb15-tag--b { right: 14%; color: var(--accent); background: rgba(79, 195, 247, 0.16); border: 1px solid rgba(79, 195, 247, 0.4); animation: sb15-t2 var(--loop) ease-out infinite both; }

@keyframes sb15-card {
  0%, 40% { background-color: var(--ink); border-width: 3px; border-color: #000; border-radius: 4px; box-shadow: 7px 7px 0 rgba(0, 0, 0, 0.85); }
  56%, 88% { background-color: var(--bg-raise); border-width: 1px; border-color: rgba(79, 195, 247, 0.45); border-radius: 18px; box-shadow: 0 0 30px rgba(79, 195, 247, 0.16); }
  100% { background-color: var(--ink); border-width: 3px; border-color: #000; border-radius: 4px; box-shadow: 7px 7px 0 rgba(0, 0, 0, 0.85); }
}
@keyframes sb15-ai {
  0%, 40% { background-color: #fff; color: #0a0f1c; border-width: 2px; border-color: #000; border-radius: 2px; box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.55); }
  56%, 88% { background-color: var(--bg-raise); color: var(--ink-2); border-width: 1px; border-color: var(--line); border-radius: 14px; box-shadow: 0 0 0 rgba(0, 0, 0, 0); }
  100% { background-color: #fff; color: #0a0f1c; border-width: 2px; border-color: #000; border-radius: 2px; box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.55); }
}
@keyframes sb15-me {
  0%, 40% { background-color: #000; color: #f4f6fa; border-width: 2px; border-color: #000; border-radius: 2px; box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.55); }
  56%, 88% { background-color: rgba(255, 255, 255, 0.1); color: var(--ink); border-width: 1px; border-color: rgba(255, 255, 255, 0.16); border-radius: 14px; box-shadow: 0 0 0 rgba(0, 0, 0, 0); }
  100% { background-color: #000; color: #f4f6fa; border-width: 2px; border-color: #000; border-radius: 2px; box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.55); }
}
@keyframes sb15-btn {
  0%, 40% { background-color: #fff; color: #0a0f1c; border: 2px solid #000; border-radius: 2px; box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.55); }
  56%, 88% { background-color: var(--accent); color: #031018; border: 1px solid transparent; border-radius: 16px; box-shadow: 0 0 0 rgba(0, 0, 0, 0); }
  100% { background-color: #fff; color: #0a0f1c; border: 2px solid #000; border-radius: 2px; box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.55); }
}
@keyframes sb15-txt { 0%, 40% { color: #0a0f1c; } 56%, 88% { color: var(--ink-2); } 100% { color: #0a0f1c; } }
@keyframes sb15-dot { 0%, 40% { background-color: rgba(0, 0, 0, 0.3); } 56%, 88% { background-color: rgba(255, 255, 255, 0.18); } 100% { background-color: rgba(0, 0, 0, 0.3); } }
@keyframes sb15-t1 { 0%, 8% { opacity: 0; } 14%, 44% { opacity: 1; } 52%, 100% { opacity: 0; } }
@keyframes sb15-t2 { 0%, 50% { opacity: 0; } 58%, 90% { opacity: 1; } 96%, 100% { opacity: 0; } }

/* ================= 16 · 规格 ================= */
.sb16 { position: absolute; left: 50%; top: 50%; width: 72%; transform: translate(-50%, -50%); display: flex; flex-direction: column; gap: 14px; align-items: center; min-width: 0; }
.sb16-table { width: 100%; border-radius: 12px; border: 1px solid var(--line); background: rgba(255, 255, 255, 0.02); overflow: hidden; }
.sb16-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 16px; border-bottom: 1px solid var(--line); font-size: 12.5px; min-width: 0; }
.sb16-row:last-child { border-bottom: 0; }
.sb16-row span { color: var(--ink-3); flex: none; }
.sb16-row b { font-weight: 600; color: var(--ink); text-align: right; overflow-wrap: anywhere; min-width: 0; }
.sb16-row.r1 { animation: sb16-r1 var(--loop) ease-out infinite both; }
.sb16-row.r2 { animation: sb16-r2 var(--loop) ease-out infinite both; }
.sb16-row.r3 { animation: sb16-r3 var(--loop) ease-out infinite both; }
.sb16-row.r4 { animation: sb16-r4 var(--loop) ease-out infinite both; }
.sb16-lock { display: flex; align-items: center; gap: 9px; padding: 9px 18px; border-radius: 999px; background: rgba(79, 195, 247, 0.12); border: 1px solid rgba(79, 195, 247, 0.4); font-size: 13px; font-weight: 600; color: var(--accent); box-shadow: 0 0 26px rgba(79, 195, 247, 0.2); animation: sb16-lockpulse 2.6s ease-in-out infinite; }
.sb16-lock svg { width: 16px; height: 16px; flex: none; }

@keyframes sb16-r1 { 0%, 2% { opacity: 0; transform: translateY(8px); } 8%, 90% { opacity: 1; transform: none; } 96%, 100% { opacity: 0; } }
@keyframes sb16-r2 { 0%, 14% { opacity: 0; transform: translateY(8px); } 20%, 90% { opacity: 1; transform: none; } 96%, 100% { opacity: 0; } }
@keyframes sb16-r3 { 0%, 26% { opacity: 0; transform: translateY(8px); } 32%, 90% { opacity: 1; transform: none; } 96%, 100% { opacity: 0; } }
@keyframes sb16-r4 { 0%, 38% { opacity: 0; transform: translateY(8px); } 44%, 90% { opacity: 1; transform: none; } 96%, 100% { opacity: 0; } }
@keyframes sb16-lockpulse { 0%, 100% { box-shadow: 0 0 18px rgba(79, 195, 247, 0.18); } 50% { box-shadow: 0 0 34px rgba(79, 195, 247, 0.4); } }

/* ================= 收尾一 · 一封信 ================= */
.letter { max-width: 860px; margin: 0 auto; padding: clamp(90px, 14vh, 160px) var(--gutter) 0; }
.letter__inner { text-align: center; }
.letter__card {
  text-align: left; margin: 0 auto; max-width: 720px;
  padding: clamp(28px, 5vw, 52px); border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--line);
  box-shadow: 0 40px 100px rgba(0, 0, 0, 0.4), 0 0 60px rgba(79, 195, 247, 0.06);
}
.letter__head { display: flex; align-items: center; gap: 9px; margin-bottom: 26px; }
.letter__head .nav__mark { width: 26px; height: 26px; }
.letter__from { color: var(--ink-2); font-weight: 600; font-size: 15px; }
.letter__salute { color: var(--ink); font-size: clamp(19px, 2.4vw, 24px); font-weight: 600; margin-bottom: 16px; }
.letter__body { color: var(--ink-2); font-size: clamp(16px, 1.7vw, 19px); line-height: 1.95; }
.letter__body p + p { margin-top: 14px; }
.letter__close { margin-top: 28px; color: var(--accent); font-weight: 600; font-size: clamp(16px, 1.7vw, 18px); }

/* ================= 收尾二 · 页尾 ================= */
.footer-b {
  display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap;
  max-width: var(--maxw); margin: clamp(90px, 14vh, 160px) auto 0; padding: 44px var(--gutter) 60px;
  border-top: 1px solid var(--line); font-size: 13px;
}
.footer-b__brand { display: flex; align-items: center; gap: 8px; color: var(--ink); font-weight: 600; font-size: 16px; }
.footer-b__copy { color: var(--ink-3); }
.footer-b__fine { color: var(--ink-3); }

/* ================= 响应式 ================= */
@media (max-width: 820px) {
  .sb10-win { left: 16%; right: 16%; }
  .sb10-win__body { grid-template-columns: 1fr; }
  .sb10-win__body .sb-staff { display: none; }
  .sb15-card { width: 76%; }
  .sb14 { width: 80%; }
  .sb16 { width: 88%; }
}
@media (max-width: 700px) {
  .sb12 { width: 90%; }
  .sb11-big { width: 66%; margin: -33% 0 0 -33%; }
  .sb11-pc { width: 54%; }
  .sb13-pc { width: 56%; }
  .sb15-tag { top: 9%; }
  .sb15-tag--a { left: 8%; }
  .sb15-tag--b { right: 8%; }
}
@media (max-width: 390px) {
  .sb10-bubble { font-size: 11px; }
  .sb13-bubble { font-size: 11px; }
  .sb14__ans { font-size: 11.5px; }
  .sb16-row { font-size: 11.5px; padding: 9px 12px; }
}

/* ---------- 减少动态效果：动画已由 motion.css 统一禁用，此处只补齐「停在最终画面」的基准态 ---------- */
@media (prefers-reduced-motion: reduce) {
  .sb10-ballwrap, .sb10-hint { opacity: 0; }
  .sb10-ball::before { display: none; }
  .sb11-toast, .sb11-big__ring { opacity: 0; }
  .sb13-dots, .sb13-done { opacity: 0; }
  .sb13-done { opacity: 1; }
  .sb15-tag--b { opacity: 0; }
  .sb15-tag--a { opacity: 1; }
}

/* ==========================================================================
   11 · 主题：同一个界面在两套皮肤间切换（柔和 ↔ 粗野），11s 循环
   照真界面：柔和=深底细描边大圆角；粗野=浅底粗黑边硬影直角
   ========================================================================== */
.art--th2 { padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.th-stage { position: relative; flex: 1; min-height: 0; }
.th-ui { position: absolute; inset: 0; display: flex; flex-direction: column; overflow: hidden; }
/* 柔和皮肤 */
.th-soft { background: #0b1220; border: 1px solid rgba(255,255,255,.1); border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,.5); animation: th-soft 11s infinite both; }
.th-soft .th-av { background: radial-gradient(circle at 35% 30%, #ff8a7a, #e0453a 60%, #8d1f18); }
.th-soft .th-brand { color: #eef3fb; }
.th-soft .th-tb { color: rgba(238,243,251,.55); border: 1px solid rgba(255,255,255,.12); }
.th-soft .th-m--u { background: #16283f; color: #eef3fb; border: 1px solid rgba(255,255,255,.08); }
.th-soft .th-m--a { background: #f3f6fb; color: #121a26; }
/* 粗野皮肤 */
.th-hard { background: #f2ede3; border: 3px solid #14110b; border-radius: 0; box-shadow: 8px 8px 0 #14110b;
  animation: th-hard 11s infinite both; }
.th-hard .th-av { background: #e0453a; border: 2px solid #14110b; }
.th-hard .th-brand { color: #14110b; }
.th-hard .th-tb { color: #14110b; border: 2px solid #14110b; background: #fff; border-radius: 0; }
.th-hard .th-m--u { background: #14110b; color: #f2ede3; border: 2px solid #14110b; border-radius: 0; }
.th-hard .th-m--a { background: #fff; color: #14110b; border: 2px solid #14110b; border-radius: 0; }
.th-hard .th-m--a { box-shadow: 4px 4px 0 #14110b; }
/* 共用 */
.th-top { height: 40px; flex: none; display: flex; align-items: center; gap: 9px; padding: 0 14px; border-bottom: 1px solid rgba(0,0,0,.06); }
.th-soft .th-top { border-bottom-color: rgba(255,255,255,.07); }
.th-hard .th-top { border-bottom: 2px solid #14110b; }
.th-av { width: 16px; height: 16px; border-radius: 50%; flex: none; }
.th-brand { font-size: 12px; font-weight: 700; }
.th-tb { font-size: 9px; border-radius: 5px; padding: 2px 7px; margin-left: auto; }
.th-tb + .th-tb { margin-left: 5px; }
.th-body { flex: 1; padding: 14px; display: flex; flex-direction: column; gap: 9px; justify-content: flex-end; min-height: 0; }
.th-m { font-size: 11px; line-height: 1.5; padding: 7px 11px; border-radius: 10px; max-width: 84%; }
.th-hard .th-m { border-radius: 0; }
.th-m--u { align-self: flex-end; }
.th-m--a { align-self: flex-start; }
@keyframes th-soft { 0%, 42% { opacity: 1; } 50%, 86% { opacity: 0; } 94%, 100% { opacity: 1; } }
@keyframes th-hard { 0%, 42% { opacity: 0; transform: translateX(6px); } 50%, 86% { opacity: 1; transform: none; } 94%, 100% { opacity: 0; transform: translateX(6px); } }
.th-cap { flex: none; text-align: center; position: relative; height: 16px; }
.th-cap span { position: absolute; inset: 0; font-size: 9.5px; letter-spacing: .08em; color: rgba(238,243,251,.5); }
.th-cap-b { color: #14110b; opacity: 0; }
.th-cap-a { animation: th-cap-a 11s infinite both; }
.th-cap-b { animation: th-cap-b 11s infinite both; }
@keyframes th-cap-a { 0%, 42% { opacity: 1; } 50%, 86% { opacity: 0; } 94%, 100% { opacity: 1; } }
@keyframes th-cap-b { 0%, 42% { opacity: 0; } 50%, 86% { opacity: 1; } 94%, 100% { opacity: 0; } }
@media (max-width: 720px) {
  .th-m { font-size: 10px; max-width: 92%; }
  .th-tb { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .th-soft, .th-hard, .th-cap-a, .th-cap-b { animation: none; }
  .th-soft { opacity: 1; } .th-hard { opacity: 0; }
  .th-cap-a { opacity: 1; } .th-cap-b { opacity: 0; }
}

/* ==========================================================================
   12 · 规格：规格表 + 「数据不出本机」锁
   ========================================================================== */
.art--sp2 { padding: 22px; display: grid; place-items: center; }
.sp-card { width: min(680px, 100%); background: rgba(255,255,255,.02); border: 1px solid rgba(255,255,255,.09);
  border-radius: 14px; padding: 8px 0; display: flex; flex-direction: column; }
.sp-row { display: flex; align-items: baseline; gap: 16px; padding: 13px 22px; border-bottom: 1px solid rgba(255,255,255,.05); opacity: 0; }
.sp-row:last-of-type { border-bottom: 0; }
.sp-k { width: 84px; flex: none; font-size: 10.5px; color: rgba(238,243,251,.42); letter-spacing: .04em; }
.sp-v { font-size: 13px; color: #eef3fb; }
.sp-r1 { animation: sp-in 8s infinite both; }
.sp-r2 { animation: sp-in 8s infinite both .12s; }
.sp-r3 { animation: sp-in 8s infinite both .24s; }
.sp-r4 { animation: sp-in 8s infinite both .36s; }
.sp-r5 { animation: sp-in 8s infinite both .48s; }
@keyframes sp-in { 0%, 2% { opacity: 0; transform: translateY(8px); } 12%, 94% { opacity: 1; transform: none; } 99%, 100% { opacity: 0; } }
.sp-lock { margin: 14px 22px 16px; display: flex; align-items: center; gap: 9px; font-size: 12px; color: #6be3a0;
  border: 1px solid rgba(107,227,160,.3); background: rgba(107,227,160,.07); border-radius: 10px; padding: 10px 14px;
  animation: sp-lock 8s infinite both; }
@keyframes sp-lock { 0%, 34% { opacity: 0; transform: scale(.97); } 44%, 94% { opacity: 1; transform: none; } 99%, 100% { opacity: 0; } }
.sp-lock-ic { width: 18px; height: 18px; flex: none; display: grid; place-items: center; }
.sp-lock-ic svg { width: 16px; height: 16px; fill: none; stroke: #6be3a0; stroke-width: 1.8; stroke-linecap: round; }
@media (max-width: 720px) {
  .art--sp2 { padding: 14px; }
  .sp-row { padding: 11px 16px; gap: 12px; }
  .sp-k { width: 62px; font-size: 9.5px; }
  .sp-v { font-size: 11.5px; }
  .sp-lock { margin: 12px 16px 14px; font-size: 11px; }
}
@media (prefers-reduced-motion: reduce) {
  .sp-row, .sp-lock { animation: none; opacity: 1; transform: none; }
}

/* ==========================================================================
   08 · 知识库：左侧目录 + 右侧笔记卡，逐张翻出来
   ========================================================================== */
.art--kb2 { padding: 0; }
.kb-app { width: 100%; height: 100%; display: flex; background: #0b1220; border-radius: 12px; overflow: hidden; }
.kb-side { width: 27%; flex: none; border-right: 1px solid rgba(255,255,255,.08); padding: 14px 12px; display: flex; flex-direction: column; gap: 7px; }
.kb-h { font-size: 10px; letter-spacing: .12em; color: rgba(238,243,251,.35); margin-bottom: 4px; }
.kb-item { font-size: 10.5px; color: rgba(238,243,251,.6); padding: 7px 9px; border-radius: 7px; }
.kb-k1 { animation: kb-on 8s infinite both; }
.kb-k2 { animation: kb-on 8s infinite both 1.4s; }
.kb-k3 { animation: kb-on 8s infinite both 2.8s; }
@keyframes kb-on {
  0%, 4% { background: transparent; color: rgba(238,243,251,.6); }
  10%, 30% { background: rgba(79,195,247,.14); color: #4fc3f7; }
  36%, 100% { background: transparent; color: rgba(238,243,251,.6); }
}
.kb-main { flex: 1; min-width: 0; padding: 14px; display: flex; flex-direction: column; gap: 9px; }
.kb-note { border: 1px solid rgba(255,255,255,.08); background: rgba(255,255,255,.025); border-radius: 10px;
  padding: 10px 12px; display: flex; flex-direction: column; gap: 4px; opacity: 0; }
.kb-note b { font-size: 10.5px; color: #4fc3f7; font-weight: 600; }
.kb-note span { font-size: 11px; color: rgba(238,243,251,.72); line-height: 1.5; }
.kb-n1 { animation: kb-in 8s infinite both; }
.kb-n2 { animation: kb-in 8s infinite both 1.4s; }
.kb-n3 { animation: kb-in 8s infinite both 2.8s; }
@keyframes kb-in { 0%, 4% { opacity: 0; transform: translateY(8px); } 14%, 94% { opacity: 1; transform: none; } 99%, 100% { opacity: 0; } }
.kb-tip { margin-top: auto; display: flex; align-items: center; gap: 7px; font-size: 9px; color: rgba(238,243,251,.38); }
.kb-mag { width: 11px; height: 11px; flex: none; border: 1.4px solid rgba(79,195,247,.6); border-radius: 50%; position: relative; }
.kb-mag::after { content: ""; position: absolute; right: -3px; bottom: -3px; width: 4px; height: 1.4px; background: rgba(79,195,247,.6); transform: rotate(45deg); }
@media (max-width: 720px) {
  .kb-side { width: 34%; padding: 10px 8px; }
  .kb-item { font-size: 9.5px; padding: 6px 7px; }
  .kb-main { padding: 10px; }
  .kb-note span { font-size: 10px; }
}
@media (prefers-reduced-motion: reduce) {
  .kb-item, .kb-note { animation: none; opacity: 1; transform: none; }
}

/* ==========================================================================
   09 · 悬浮球：桌面上一颗球 + 一条手下进度 → 点一下展开成小窗 → 收回
   ========================================================================== */
.art--fl2 { padding: 0; }
.fl-desk { position: relative; width: 100%; height: 100%; border-radius: 12px; overflow: hidden;
  background:
    radial-gradient(120% 90% at 18% 12%, rgba(79,195,247,.10), transparent 60%),
    radial-gradient(90% 80% at 82% 88%, rgba(224,69,58,.10), transparent 62%),
    #0a101c; }
.fl-ball { position: absolute; left: 82%; top: 74%; width: 54px; height: 54px; border-radius: 50%;
  background: radial-gradient(circle at 34% 30%, #ff8a7a, #e0453a 58%, #8d1f18);
  box-shadow: 0 0 0 3px rgba(255,255,255,.08), 0 10px 26px rgba(0,0,0,.55);
  display: grid; place-items: center; animation: fl-idle 8s infinite both; }
.fl-face { width: 22px; height: 14px; border-radius: 0 0 12px 12px; border: 2px solid rgba(255,255,255,.85);
  border-top: 0; animation: fl-face 8s infinite both; }
@keyframes fl-idle {
  0%, 18% { transform: scale(1); box-shadow: 0 0 0 3px rgba(255,255,255,.08), 0 10px 26px rgba(0,0,0,.55); }
  22% { transform: scale(.9); }
  26%, 34% { transform: scale(1); box-shadow: 0 0 0 6px rgba(79,195,247,.35), 0 10px 26px rgba(0,0,0,.55); }
  34% { transform: scale(1); opacity: 1; }
  42%, 84% { transform: scale(.55); opacity: 0; }
  94%, 100% { transform: scale(1); opacity: 1; }
}
@keyframes fl-face { 0%, 26% { transform: scaleY(.6); } 30%, 88% { transform: scaleY(1); } 94%, 100% { transform: scaleY(.6); } }
.fl-pill { position: absolute; left: 60%; top: 64%; display: flex; align-items: center; gap: 6px;
  font-size: 9.5px; color: #cfe7f5; background: rgba(11,18,32,.92); border: 1px solid rgba(79,195,247,.35);
  border-radius: 999px; padding: 5px 11px; white-space: nowrap; animation: fl-pill 8s infinite both; }
@keyframes fl-pill {
  0%, 4% { opacity: 0; transform: translateY(5px); }
  10%, 88% { opacity: 1; transform: none; }
  94%, 100% { opacity: 0; transform: translateY(5px); }
}
.fl-win { position: absolute; left: 30%; top: 12%; width: 44%; height: 62%; display: flex; flex-direction: column;
  background: #0b1220; border: 1px solid rgba(255,255,255,.1); border-radius: 12px; overflow: hidden;
  box-shadow: 0 24px 60px rgba(0,0,0,.6); opacity: 0; transform: scale(.86) translateY(14px); transform-origin: 86% 86%;
  animation: fl-win 8s cubic-bezier(.22,.9,.24,1) infinite both; }
@keyframes fl-win {
  0%, 28% { opacity: 0; transform: scale(.86) translateY(14px); }
  36%, 84% { opacity: 1; transform: none; }
  92%, 100% { opacity: 0; transform: scale(.9) translateY(10px); }
}
.fl-win-top { height: 32px; flex: none; display: flex; align-items: center; gap: 7px; padding: 0 10px; border-bottom: 1px solid rgba(255,255,255,.08); }
.fl-win-av { width: 13px; height: 13px; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #ff8a7a, #e0453a 60%, #8d1f18); }
.fl-win-top b { font-size: 10.5px; color: #eef3fb; }
.fl-win-x { margin-left: auto; font-size: 8.5px; color: rgba(238,243,251,.4); border: 1px solid rgba(255,255,255,.1); border-radius: 4px; padding: 2px 6px; }
.fl-win-body { flex: 1; padding: 10px; display: flex; flex-direction: column; gap: 7px; justify-content: flex-end; }
.fl-win-m { font-size: 10px; line-height: 1.5; padding: 7px 10px; border-radius: 9px; background: #f3f6fb; color: #121a26; align-self: flex-start; max-width: 92%; }
.fl-win-in { height: 24px; border-radius: 7px; border: 1px solid rgba(255,255,255,.1); background: rgba(255,255,255,.03);
  font-size: 9px; color: rgba(238,243,251,.35); display: flex; align-items: center; padding: 0 9px; }
@media (max-width: 720px) {
  .fl-win { left: 16%; width: 68%; top: 10%; height: 66%; }
  .fl-ball { left: 78%; width: 44px; height: 44px; }
  .fl-pill { left: 58%; font-size: 8.5px; padding: 4px 9px; }
}
@media (prefers-reduced-motion: reduce) {
  .fl-ball, .fl-face, .fl-pill, .fl-win { animation: none; }
  .fl-win { opacity: 1; transform: none; }
  .fl-pill { opacity: 1; transform: none; }
}