// =============================================================================
//  TEDxNingbo 开场片 · 复刻 (After Effects ExtendScript)
//  参考: 烧麦/Somei 动态设计作品 (B站对比视频上画面)
//  生成: 1920x1080 / 30fps / 35s 合成, 16 个段落, 与 Python 预览渲染同时间轴
//
//  用法: After Effects -> 文件 -> 脚本 -> 运行脚本文件... 选择本文件
//  注意: 字体名按本机情况修改 FONT_LATIN / FONT_CJK (见下)
// =============================================================================

app.beginUndoGroup("TEDx Opening Recreation");

// ---------------------------------------------------------------- 配置
var W = 1920, H = 1080, FPS = 30, DUR = 35;

// 从参考片取样的主色
var NAVY = [10, 10, 77];    // 藏青 (主背景)
var RED  = [226, 47, 57];   // 红
var YEL  = [252, 221, 29];  // 黄
var BLU  = [26, 58, 226];   // 蓝
var WHT  = [255, 255, 255];
var BLK  = [16, 16, 16];
var ORG  = [243, 124, 16];  // 橙

// 字体: 按本机可用字体修改 (Windows 常用 Arial-BoldMT / MicrosoftYaHei-Bold)
var FONT_LATIN = "Arial-BoldMT";
var FONT_CJK   = "MicrosoftYaHei-Bold";

var PI = "3.14159265358979323846264338327950288419716939937510" +
         "58209749445923078164062862089986280348253421170679" +
         "82148086513282306647093844609550582231725359408128" +
         "48111745028410270193852110555964462294895493038196";

// ---------------------------------------------------------------- 工具
function C(a) { return [a[0] / 255, a[1] / 255, a[2] / 255]; }
function T(l) { return l.property("ADBE Transform Group"); }
function lpos(l, v)   { T(l).property("ADBE Position").setValue(v); }
function lscale(l, v) { T(l).property("ADBE Scale").setValue(v); }
function lrot(l, v)   { T(l).property("ADBE Rotate Z").setValue(v); }
function lopac(l, v)  { T(l).property("ADBE Opacity").setValue(v); }
function k(prop, t, v) { prop.setValueAtTime(t, v); }
function kf(prop, t0, v0, t1, v1) { prop.setValueAtTime(t0, v0); prop.setValueAtTime(t1, v1); }

// 给某属性的所有关键帧加缓动
function easeAll(prop, infl, outfl) {
    infl = (infl === undefined) ? 0.33 : infl;
    outfl = (outfl === undefined) ? 0.33 : outfl;
    for (var i = 1; i <= prop.numKeys; i++) {
        prop.setTemporalEaseAtKey(i, [new KeyframeEase(0, infl)], [new KeyframeEase(0, outfl)]);
    }
}

function solid(name, c, t0, t1) {
    var l = comp.layers.addSolid(C(c), name, W, H, 1, DUR);
    l.inPoint = t0; l.outPoint = t1;
    return l;
}

function shapeLayer(name, t0, t1) {
    var l = comp.layers.addShape();
    l.name = name;
    l.inPoint = (t0 === undefined) ? 0 : t0;
    l.outPoint = (t1 === undefined) ? DUR : t1;
    return l;
}

// --- 形状组 ---
function grp(layer, name) {
    var g = layer.property("ADBE Root Vectors Group").addProperty("ADBE Vector Group");
    g.name = name;
    return g;
}
function gcont(g)  { return g.property("ADBE Vectors Group"); }
function gtrans(g) { return g.property("ADBE Vector Transform Group"); }
function gpos(g, v)   { gtrans(g).property("ADBE Vector Position").setValue(v); }
function gscale(g, v) { gtrans(g).property("ADBE Vector Scale").setValue(v); }
function grot(g, v)   { gtrans(g).property("ADBE Vector Rotation").setValue(v); }
function gopac(g, v)  { gtrans(g).property("ADBE Vector Group Opacity").setValue(v); }

function addRect(g, w, h) {
    var r = gcont(g).addProperty("ADBE Vector Shape - Rect");
    r.property("ADBE Vector Rect Size").setValue([w, h]);
    return r;
}
function addEll(g, w, h) {
    var e = gcont(g).addProperty("ADBE Vector Shape - Ellipse");
    e.property("ADBE Vector Ellipse Size").setValue([w, h]);
    return e;
}
function addStar(g, pts, outer, inner, type, rotation) {
    var s = gcont(g).addProperty("ADBE Vector Shape - Star");
    s.property("ADBE Vector Star Type").setValue(type);          // 1=星形 2=多边形
    s.property("ADBE Vector Star Points").setValue(pts);
    s.property("ADBE Vector Star Outer Radius").setValue(outer);
    if (type === 1) s.property("ADBE Vector Star Inner Radius").setValue(inner);
    s.property("ADBE Vector Star Rotation").setValue(rotation || 0);
    return s;
}
function addPath(g, pts, closed) {
    var sh = gcont(g).addProperty("ADBE Vector Shape - Group");
    var s = new Shape();
    s.vertices = pts;
    s.closed = (closed === undefined) ? true : closed;
    sh.property("ADBE Vector Shape").setValue(s);
    return sh;
}
function fill(g, c, op) {
    var f = gcont(g).addProperty("ADBE Vector Graphic - Fill");
    f.property("ADBE Vector Fill Color").setValue(C(c));
    if (op !== undefined) f.property("ADBE Vector Fill Opacity").setValue(op);
    return f;
}
function stroke(g, c, w, op) {
    var s = gcont(g).addProperty("ADBE Vector Graphic - Stroke");
    s.property("ADBE Vector Stroke Color").setValue(C(c));
    s.property("ADBE Vector Stroke Width").setValue(w);
    if (op !== undefined) s.property("ADBE Vector Stroke Opacity").setValue(op);
    return s;
}
function trimPaths(g, start, end) {
    var t = gcont(g).addProperty("ADBE Vector Filter - Trim");
    t.property("ADBE Vector Trim Start").setValue(start);
    t.property("ADBE Vector Trim End").setValue(end);
    return t;
}
// 线性渐变填充 (stops: [[pos,color],...])
function gradFill(g, stops, type, p0, p1) {
    var f = gcont(g).addProperty("ADBE Vector Graphic - G-Fill");
    f.property("ADBE Vector Grad Type").setValue(type === "radial" ? 2 : 1);
    var arr = [];
    for (var i = 0; i < stops.length; i++) {
        var c = C(stops[i][1]);
        arr.push(stops[i][0], c[0], c[1], c[2]);
    }
    f.property("ADBE Vector Grad Colors").setValue(arr);
    f.property("ADBE Vector Grad Start Point").setValue(p0 || [-W / 2, 0]);
    f.property("ADBE Vector Grad End Point").setValue(p1 || [W / 2, 0]);
    return f;
}

// --- 文本 ---
function textLayer(str, size, color, pos, font, just) {
    var l = comp.layers.addText(str);
    var src = l.property("ADBE Text Properties").property("ADBE Text Document");
    var td = src.value;
    td.font = (font || FONT_LATIN);
    td.fontSize = size;
    td.fillColor = C(color);
    td.applyFill = true;
    td.justification = (just === undefined) ? ParagraphJustification.CENTER_JUSTIFY : just;
    src.setValue(td);
    lpos(l, pos);
    return l;
}
// 伪粗 (描边加粗)
function bolden(layer, w, c) {
    var src = layer.property("ADBE Text Properties").property("ADBE Text Document");
    var td = src.value;
    td.applyStroke = true;
    td.strokeColor = C(c || WHT);
    td.strokeWidth = w;
    td.strokeOverFill = false;
    src.setValue(td);
    return layer;
}

// 渐变文字: 文本层作 alpha 蒙版 + 全屏渐变层
function gradientText(str, size, pos, stops, font) {
    var matte = textLayer(str, size, WHT, pos, font);
    matte.name = "matte:" + str.substring(0, 12);
    var g = shapeLayer("grad:" + str.substring(0, 12), 0, DUR);
    var gg = grp(g, "gradient");
    addRect(gg, W, H);
    gradFill(gg, stops, "linear", [-W / 2, 0], [W / 2, 0]);
    g.moveToBeginning();
    g.trackMatteType = TrackMatteType.ALPHA;
    g.moveAfter(matte);
    return { matte: matte, grad: g };
}

// ---------------------------------------------------------------- 合成
var comp = app.project.items.addComp("TEDx_Opening_Recreation", W, H, 1, DUR, FPS);
comp.openInViewer();

// 主背景 (藏青) —— 最底层, 覆盖全片
var bgNavy = solid("BG_Navy", NAVY, 0, DUR);
bgNavy.moveToEnd();

// =============================================================================
//  S1  0.00-1.22  π 出现
// =============================================================================
(function () {
    var t0 = 0.00, t1 = 1.22;
    var l = textLayer("\u03C0", 300, YEL, [W * 0.20, H * 0.50]);
    l.name = "S1_Pi";
    l.inPoint = t0; l.outPoint = t1;
    kf(lpos(l), t0, [W * 0.20, H * 0.50], t1, [W * 0.30, H * 0.50]);
    kf(lscale(l), t0, [55, 55], 0.75, [100, 100]);
    lscale(l).setValueAtTime(0.42, [104, 104]);
    easeAll(lscale(l));
    easeAll(lpos(l));
})();

// =============================================================================
//  S2  1.22-1.30  淡黄闪帧 (参考里只有 4 帧, 实测色值 #F3F2B0)
// =============================================================================
(function () {
    var t0 = 1.22, t1 = 1.30;
    var fl = shapeLayer("S2_Flash", t0, t1);
    var g = grp(fl, "flash");
    addRect(g, W, H);
    fill(g, [243, 242, 176]);
    var sc = gscale(g);
    k( sc, t0, [0, 100]);
    k( sc, 1.238, [100, 100]);
    k( sc, 1.268, [100, 100]);
    k( sc, t1, [0, 100]);
    easeAll(sc, 0.2, 0.2);
})();

// =============================================================================
//  S3  1.30-1.85  碎片聚合 (碎片很小, 参考里每个约 20px)
// =============================================================================
(function () {
    var t0 = 1.30, t1 = 1.85;
    var cx = W * 0.24, cy = H * 0.52;
    var cols = [YEL, YEL, RED, BLU];
    for (var i = 0; i < 12; i++) {
        var s = shapeLayer("S3_frag" + i, t0, t1);
        var g = grp(s, "f");
        if (i % 3 === 0) addStar(g, 3, 18 + (i % 4) * 9, 9, 1, 0);
        else addRect(g, 20 + (i % 4) * 9, 7);
        fill(g, cols[i % 4]);
        var ang = (i / 12) * Math.PI * 2;
        var d = 140 + (i % 5) * 46;
        var sx = cx + Math.cos(ang) * d, sy = cy + Math.sin(ang) * d;
        gpos(g, [sx, sy]);
        var gp = gtrans(g).property("ADBE Vector Position");
        k(gp, t0, [sx, sy]);
        k(gp, 1.81, [cx + Math.cos(ang) * 62, cy + Math.sin(ang) * 62]);
        easeAll(gp);
        var rp = grot(g);
        k(rp, t0, 0); k(rp, 1.85, 140 + i * 30);
        var op = gopac(g);
        k(op, t0, 0); k(op, t0 + 0.05, 100);
    }
})();

// =============================================================================
//  S4  1.80-6.55  π 数字流
// =============================================================================
(function () {
    var t0 = 1.85, t1 = 6.55;
    // 主数字: 逐字字距 + 加速横滚 (表达式)
    var matte = textLayer(PI, 560, WHT, [0, H * 0.50], FONT_LATIN,
                          ParagraphJustification.LEFT_JUSTIFY);
    matte.name = "S4_PiDigits_matte";
    matte.inPoint = t0; matte.outPoint = t1;
    // 字距收紧, 让巨大字重贴合参考
    try {
        matte.property("ADBE Text Properties").property("ADBE Text More Options")
             .property("ADBE Text Tracking").setValue(-140);
    } catch (e) {}
    // 位置/缩放表达式: 加速横滚 + 1.9s 呼吸
    matte.property("ADBE Transform Group").property("ADBE Position").expression =
        "var t = time;\n" +
        "var k = 0.5 + 0.5*Math.cos(2*Math.PI*(t-2.60)/1.90);\n" +
        "var off = 2*400*Math.pow(Math.max(0,t-1.85), 2.15);\n" +
        "[120 - off, " + (H * 0.50) + "];";
    matte.property("ADBE Transform Group").property("ADBE Scale").expression =
        "var t = time;\n" +
        "var k = 0.5 + 0.5*Math.cos(2*Math.PI*(t-2.60)/1.90);\n" +
        "var s = (430 + 250*k) / 560 * 100;\n" +
        "[s, s];";
    matte.property("ADBE Transform Group").property("ADBE Opacity").expression =
        "linear(time, 6.30, 6.55, 100, 0);";

    // 渐变填充层 (屏幕空间黄->橙->红)
    var g = shapeLayer("S4_PiDigits_grad", t0, t1);
    var gg = grp(g, "grad");
    addRect(gg, W, H);
    gradFill(gg, [[0, YEL], [0.30, [255, 176, 30]], [0.62, ORG], [0.88, RED], [1, RED]],
             "linear", [-W / 2, 0], [W / 2, 0]);
    g.moveToBeginning();
    g.trackMatteType = TrackMatteType.ALPHA;
    g.moveAfter(matte);

    // 左侧红色小数点标记
    var dot = shapeLayer("S4_Dot", t0, t1);
    var dg = grp(dot, "d");
    addEll(dg, 26, 26);
    fill(dg, RED);
    gpos(dg, [34, H * 0.50 + 168]);
    grot(dg, 0);

    // 微型数字串 (6.32-6.55)
    var m2 = textLayer(PI + PI, 62, RED, [120, H * 0.50 + 10], FONT_LATIN,
                       ParagraphJustification.LEFT_JUSTIFY);
    m2.name = "S4_MicroDigits";
    m2.inPoint = 6.32; m2.outPoint = t1;
    m2.property("ADBE Transform Group").property("ADBE Position").expression =
        "[120 - 620*(time - 6.32), " + (H * 0.50 + 10) + "];";
    var ln = shapeLayer("S4_MicroLine", 6.32, t1);
    var lg = grp(ln, "l");
    addRect(lg, W, 5);
    fill(lg, RED);
    gpos(lg, [W / 2, H * 0.50 - 54]);
    gscale(lg, [100, 100]);
})();

// =============================================================================
//  S5  6.55-8.60  红色横条: 2 条粗条 -> 各裂成 2 条, 中央黄细线 + 微缩数字
// =============================================================================
(function () {
    var t0 = 6.55, t1 = 8.60;
    var bars = [[0.140, 0.062, 0.260, 0.125],
                [0.140, 0.378, 0.000, 0.135],
                [0.760, 0.662, 0.260, 0.120],
                [0.760, 0.936, 0.000, 0.135]];
    for (var i = 0; i < 4; i++) {
        var b = bars[i];
        var l = shapeLayer("S5_Bar" + i, t0, t1);
        var g = grp(l, "bar");
        var rct = addRect(g, W, Math.max(1, b[2] * H));
        fill(g, RED);
        var szp = rct.property("ADBE Vector Rect Size");
        k(szp, 7.05, [W, Math.max(1, b[2] * H)]);
        k(szp, 7.75, [W, Math.max(1, b[3] * H)]);
        k(szp, 8.50, [W, Math.max(1, b[3] * H * 0.66)]);
        easeAll(szp, 0.2, 0.2);
        var d = (i % 2 === 0) ? 1 : -1;
        var gp = gtrans(g).property("ADBE Vector Position");
        var startX = (d > 0) ? -W / 2 : W * 1.5;
        k(gp, t0, [startX, b[0] * H]);
        k(gp, 7.15, [W / 2, b[0] * H]);
        k(gp, 7.75, [W / 2, b[1] * H]);
        k(gp, 8.52, [W / 2, b[1] * H]);
        k(gp, 8.63, [(d > 0) ? W * 1.6 : -W * 0.6, b[1] * H]);
        easeAll(gp, 0.2, 0.2);
    }
    var ln = shapeLayer("S5_YellowLine", 6.92, 7.95);
    var lg = grp(ln, "l");
    addRect(lg, W, 4);
    fill(lg, YEL);
    gpos(lg, [W / 2, H * 0.50]);
    var op = gopac(lg);
    k(op, 6.92, 0); k(op, 7.16, 100); k(op, 7.62, 100); k(op, 7.95, 0);
    var m2 = textLayer(PI + PI, 58, YEL, [120, H * 0.50 - 22], FONT_LATIN,
                       ParagraphJustification.LEFT_JUSTIFY);
    m2.name = "S5_MicroDigits";
    m2.inPoint = 6.92; m2.outPoint = 7.95;
    m2.property("ADBE Transform Group").property("ADBE Position").expression =
        "[120 - 640*(time - 6.92), " + (H * 0.50 - 22) + "];";
    var o2 = T(m2).property("ADBE Opacity");
    k(o2, 6.92, 0); k(o2, 7.16, 90); k(o2, 7.62, 90); k(o2, 7.95, 0);
})();

// =============================================================================
//  S6  8.60-9.60  黄环 + 橙球
// =============================================================================
(function () {
    var t0 = 8.60, t1 = 9.60;
    var cx = W * 0.335, cy = H * 0.50, R = 452;
    // 黄环 (描边 + 修剪路径)
    var l = shapeLayer("S6_Ring", t0, t1);
    var g = grp(l, "ring");
    addEll(g, R, R);
    stroke(g, YEL, 36);
    var tp = trimPaths(g, 0, 0);
    gpos(g, [cx, cy]);
    grot(g, -90);
    var te = tp.property("ADBE Vector Trim End");
    k(te, t0, 0); k(te, 9.35, 100);
    easeAll(te, 0.25, 0.25);
    // 刻度 (中继器)
    var tick = shapeLayer("S6_Ticks", t0, t1);
    var tg = grp(tick, "t");
    var trct = addRect(tg, 4, 14);
    trct.property("ADBE Vector Rect Position").setValue([R / 2 + 42, 0]);
    fill(tg, YEL);
    var rep = gcont(tg).addProperty("ADBE Vector Filter - Repeater");
    rep.property("ADBE Vector Repeater Copies").setValue(28);
    rep.property("ADBE Vector Repeater Transform").property("ADBE Vector Repeater Rotation").setValue(360 / 28);
    gpos(tg, [cx, cy]);
    var top = gtrans(tg).property("ADBE Vector Group Opacity");
    k(top, t0, 0); k(top, 9.00, 100);
    // 橙球 (径向渐变)
    var b = shapeLayer("S6_Ball", t0, t1);
    var bg = grp(b, "ball");
    addEll(bg, 200, 200);
    gradFill(bg, [[0, [255, 236, 120]], [0.55, [255, 170, 30]], [1, [243, 124, 16]]],
             "radial", [0, 0], [0, 100]);
    gpos(bg, [cx, cy]);
    var bs = gscale(bg);
    k(bs, 8.85, [0, 0]); k(bs, 9.30, [104, 104]); k(bs, 9.45, [100, 100]);
    easeAll(bs);
    // 右侧小方块
    var sq = shapeLayer("S6_Square", 9.10, t1);
    var sg = grp(sq, "s");
    addRect(sg, 16, 16);
    fill(sg, YEL);
    gpos(sg, [cx + R / 2 + 50, cy]);
    var sop = gopac(sg);
    k(sop, 9.10, 0); k(sop, 9.45, 100);
})();

// =============================================================================
//  S7  9.60-12.20  界/限 -> 无/限 (太阳)
// =============================================================================
(function () {
    var t0 = 9.60, t1 = 12.20;
    // 大圆弧
    var l = shapeLayer("S7_Arc", t0, t1);
    var g = grp(l, "arc");
    addEll(g, 1400, 1400);
    stroke(g, YEL, 16);
    trimPaths(g, 0, 34);
    gpos(g, [W * 0.98, H * 0.52]);
    grot(g, 150);
    // 右侧刻度条
    var bars = shapeLayer("S7_Ruler", 9.55, t1);
    var rg = grp(bars, "r");
    var brc = addRect(rg, 6, H * 0.40);
    brc.property("ADBE Vector Rect Position").setValue([-120, 0]);
    fill(rg, YEL);
    var rep = gcont(rg).addProperty("ADBE Vector Filter - Repeater");
    rep.property("ADBE Vector Repeater Copies").setValue(7);
    rep.property("ADBE Vector Repeater Transform").property("ADBE Vector Repeater Position").setValue([40, 0]);
    gpos(rg, [W * 0.855, H * 0.50]);
    var rop = gtrans(rg).property("ADBE Vector Group Opacity");
    k(rop, 9.55, 0); k(rop, 9.95, 100);
    // 左上黄扇形
    var fan = shapeLayer("S7_Fan", 9.50, t1);
    var fg = grp(fan, "f");
    addStar(fg, 4, 250, 0, 2, 45);   // 4 边形近似扇形
    fill(fg, YEL);
    gpos(fg, [W * 0.10, H * 0.06]);
    var fop = gopac(fg);
    k(fop, 9.50, 0); k(fop, 9.95, 100);
    // 橙色太阳
    var b = shapeLayer("S7_Sun", t0, t1);
    var bg = grp(b, "sun");
    addEll(bg, 200, 200);
    gradFill(bg, [[0, [255, 236, 120]], [0.55, [255, 170, 30]], [1, [243, 124, 16]]],
             "radial", [0, 0], [0, 100]);
    var bp = gtrans(bg).property("ADBE Vector Position");
    var bs = gscale(bg);
    k(bp, 9.60, [W * 0.10, H * 0.50]);
    k(bp, 10.60, [W * 0.17, H * 0.50]);
    k(bp, 11.10, [W * 0.36, H * 0.51]);
    k(bp, 11.80, [W * 0.20, H * 0.50]);
    k(bp, 12.20, [W * 0.62, H * 0.50]);
    easeAll(bp);
    k(bs, 9.60, [15, 15]); k(bs, 10.45, [340, 340]);
    k(bs, 11.50, [340, 340]); k(bs, 12.05, [24, 24]);
    easeAll(bs);
    // 中文: 界 -> 无 (交叉淡化), 限 由黄转红
    function cjk(name, ch, y, colr, a0, a1, b0, b1) {
        var t = textLayer(ch, 118, colr, [W * 0.70, y], FONT_CJK);
        t.name = name; t.inPoint = t0; t.outPoint = t1;
        var op = T(t).property("ADBE Opacity");
        if (a0 !== null) k(op, a0, 0);
        k(op, a1, 100);
        if (b0 !== null) { k(op, b0, 100); k(op, b1, 0); }
        return t;
    }
    cjk("S7_Jie",  "\u754C", H * 0.42, YEL, null, 9.85, 10.42, 10.68);
    cjk("S7_Xian1","\u9650", H * 0.62, YEL, null, 10.15, 10.52, 10.72);
    cjk("S7_Wu",   "\u65E0", H * 0.42, RED, 10.42, 10.80, null, null);
    cjk("S7_Xian2","\u9650", H * 0.62, RED, 10.52, 10.90, null, null);
})();

// =============================================================================
//  S8  12.20-14.00  有限 (B 形几何)
// =============================================================================
(function () {
    var t0 = 12.20, t1 = 14.00;
    var cx = W * 0.28, cy = H * 0.52;
    // B 形: 竖线 + 上下半圆
    var l = shapeLayer("S8_B", t0, t1);
    var vg = grp(l, "stem");
    addRect(vg, 34, 340);
    fill(vg, YEL);
    gpos(vg, [cx, cy]);
    var u1 = grp(l, "u1");
    addEll(u1, 336, 336);
    fill(u1, YEL);
    gpos(u1, [cx, cy - 84]);
    var u2 = grp(l, "u2");
    addEll(u2, 336, 336);
    fill(u2, YEL);
    gpos(u2, [cx, cy + 84]);
    // 用蒙版裁掉左半边 -> 半圆
    var m1 = l.property("ADBE Mask Parade").addProperty("ADBE Mask Atom");
    var sh = new Shape();
    sh.vertices = [[cx, cy - 260], [cx + 300, cy - 260], [cx + 300, cy + 90], [cx, cy + 90]];
    sh.closed = true;
    m1.property("ADBE Mask Shape").setValue(sh);
    m1.maskMode = MaskMode.ADD;
    var m2 = l.property("ADBE Mask Parade").addProperty("ADBE Mask Atom");
    var sh2 = new Shape();
    sh2.vertices = [[cx, cy - 90], [cx + 300, cy - 90], [cx + 300, cy + 260], [cx, cy + 260]];
    sh2.closed = true;
    m2.property("ADBE Mask Shape").setValue(sh2);
    m2.maskMode = MaskMode.ADD;
    // 整体缩放进入
    var ls = T(l).property("ADBE Scale");
    k(ls, t0, [0, 0]); k(ls, 12.72, [100, 100]);
    easeAll(ls);
    // 橙色球
    function ball(name, x, y, d, tA, tB) {
        var b = shapeLayer(name, t0, t1);
        var bg = grp(b, "b");
        addEll(bg, 200, 200);
        gradFill(bg, [[0, [255, 236, 120]], [0.55, [255, 170, 30]], [1, [243, 124, 16]]],
                 "radial", [0, 0], [0, 100]);
        gpos(bg, [x, y]);
        var s = gscale(bg);
        k(s, tA, [0, 0]); k(s, tB, [d / 2, d / 2]);
        easeAll(s);
        return b;
    }
    ball("S8_ballA", cx + 100, cy - 82, 172, 12.45, 13.10);
    ball("S8_ballB", cx + 86,  cy + 68, 124, 12.55, 13.20);
    // 两侧橙色半圆
    var sl = shapeLayer("S8_SideL", t0, t1);
    var slg = grp(sl, "s");
    addEll(slg, 450, 450);
    fill(slg, ORG);
    gpos(slg, [0, H * 0.50]);
    var slp = gtrans(slg).property("ADBE Vector Position");
    k(slp, 12.32, [-225, H * 0.50]); k(slp, 12.87, [0, H * 0.50]);
    easeAll(slp);
    var sr = shapeLayer("S8_SideR", t0, t1);
    var srg = grp(sr, "s");
    addEll(srg, 450, 450);
    fill(srg, ORG);
    gpos(srg, [W, H * 0.50]);
    var srp = gtrans(srg).property("ADBE Vector Position");
    k(srp, 12.78, [W + 225, H * 0.50]); k(srp, 13.33, [W, H * 0.50]);
    easeAll(srp);
    // 有 限 + 横条
    var y1 = textLayer("\u6709", 112, YEL, [W * 0.62, H * 0.42], FONT_CJK);
    var y2 = textLayer("\u9650", 112, YEL, [W * 0.62, H * 0.64], FONT_CJK);
    y1.name = "S8_You"; y2.name = "S8_Xian";
    y1.inPoint = t0; y1.outPoint = t1; y2.inPoint = t0; y2.outPoint = t1;
    var o1 = T(y1).property("ADBE Opacity"), o2 = T(y2).property("ADBE Opacity");
    k(o1, 13.05, 0); k(o1, 13.40, 100);
    k(o2, 13.05, 0); k(o2, 13.40, 100);
    var bar = shapeLayer("S8_Bar", t0, t1);
    var bg2 = grp(bar, "b");
    addRect(bg2, 330, 9);
    fill(bg2, YEL);
    gpos(bg2, [W * 0.52 + 165, H * 0.53]);
    var bsc = gscale(bg2);
    k(bsc, 13.15, [0, 100]); k(bsc, 13.70, [100, 100]);
    easeAll(bsc);
})();

// =============================================================================
//  S9  14.00-16.40  六边形 -> 等距立方体 (底切红)
// =============================================================================
(function () {
    var t0 = 14.00, t1 = 16.40;
    var cx = W * 0.50, cy = H * 0.50;
    // 红色底 (藏青 -> 红, 与 S10 连续)
    var rbg = shapeLayer("S9_RedBG", 15.28, t1);
    var rg = grp(rbg, "r");
    addRect(rg, W, H);
    fill(rg, RED);
    var rp = gtrans(rg).property("ADBE Vector Position");
    k(rp, 15.28, [-W / 2, 0]); k(rp, 15.45, [-W * 0.05, 0]);
    k(rp, 15.45, [-W * 0.05, 0]);
    k(rp, 16.45, [0, 0]);
    easeAll(rp, 0.2, 0.2);
    // 六边形描边
    var hex = shapeLayer("S9_Hex", t0, t1);
    var hg = grp(hex, "h");
    addStar(hg, 6, 584, 0, 2, 0);
    var hstroke = stroke(hg, RED, 16);
    gpos(hg, [cx, cy]);
    // 描边颜色随时间转白
    var hsc = hstroke.property("ADBE Vector Stroke Color");
    k(hsc, 14.00, C(RED)); k(hsc, 15.70, C(WHT));
    // 橙球 -> 立方体
    var ball = shapeLayer("S9_Ball", t0, 14.80);
    var bg = grp(ball, "b");
    addEll(bg, 240, 240);
    gradFill(bg, [[0, [255, 236, 120]], [0.55, [255, 170, 30]], [1, [243, 124, 16]]],
             "radial", [0, 0], [0, 100]);
    gpos(bg, [cx, cy]);
    var bs = gscale(bg);
    k(bs, 14.15, [0, 0]); k(bs, 14.70, [100, 100]);
    easeAll(bs);
    // 等距立方体 (三个面)
    var cube = shapeLayer("S9_Cube", 14.75, t1);
    function face(name, pts, colr) {
        var g = grp(cube, name);
        addPath(g, pts, true);
        fill(g, colr);
        gpos(g, [cx, cy]);
        return g;
    }
    var w = 210, hh = w * 0.577, hz = 200;
    face("top",   [[0, -hh], [w, 0], [0, hh], [-w, 0]], [255, 236, 120]);
    face("left",  [[-w, 0], [0, hh], [0, hh + hz], [-w, hz]], WHT);
    face("right", [[w, 0], [0, hh], [0, hh + hz], [w, hz]], [200, 200, 210]);
    var csc = T(cube).property("ADBE Scale");
    k(csc, 14.75, [0, 0]); k(csc, 15.15, [100, 100]);
    easeAll(csc);
    // 白线稿
    var lines = shapeLayer("S9_WhiteLines", 15.70, t1);
    for (var k2 = 0; k2 < 2; k2++) {
        var lg = grp(lines, "hex" + k2);
        addStar(lg, 6, 420 * (1 + 0.38 * k2), 0, 2, 0);
        stroke(lg, WHT, 6, 0);
        gpos(lg, [cx, cy]);
        var op = gtrans(lg).property("ADBE Vector Group Opacity");
        k(op, 15.70, 0); k(op, 16.30, 82);
        var rr = grot(lg);
        k(rr, 15.70, 0); k(rr, t1, k2 === 0 ? 90 : -90);
    }
})();

// =============================================================================
//  S10  16.40-19.50  三角拼贴 + 可 / 能
// =============================================================================
(function () {
    var t0 = 16.40, t1 = 19.50;
    var cy = H * 0.55;
    // 大三角形滑入 (顶点朝上)
    var blocks = [
        [16.40, BLU, 1250, 840, -1500,  1, 430, null, 0],
        [16.75, BLK, 1050, 920,  1550, -1, 430, null, 0],
        [17.15, WHT, 1900, 1000, -2100, 1, 340, 17.55, 1300],
        [17.82, BLK,  950,  860,  1650, -1, 430, null, 0],
        [18.25, BLU,  820,  300, -1300,  1, 430, null, 0],
        [18.55, WHT,  820,  300,  1300, -1, 430, null, 0],
        [18.92, BLK,  700,  900, -1500,  1, 430, null, 0]
    ];
    for (var i = 0; i < blocks.length; i++) {
        var b = blocks[i];
        var l = shapeLayer("S10_Tri" + i, b[0], t1);
        var g = grp(l, "t");
        addPath(g, [[0, -b[3] / 2], [b[2] / 2, b[3] / 2], [-b[2] / 2, b[3] / 2]], true);
        fill(g, b[1]);
        var gp = gtrans(g).property("ADBE Vector Position");
        var startX = (b[5] > 0) ? W * 1.5 : -W * 0.5;
        var landX = W / 2;
        k(gp, b[0], [startX, cy]);
        k(gp, b[0] + 0.50, [landX, cy]);
        if (b[7] !== null) {
            var midT = b[7], midV = b[8];
            k(gp, midT, [landX + b[5] * b[6] * (midT - b[0] - 0.50), cy]);
            k(gp, t1, [landX + b[5] * (b[6] * (midT - b[0] - 0.50) + midV * (t1 - midT)), cy]);
        } else {
            k(gp, t1, [landX + b[5] * b[6] * (t1 - b[0] - 0.50), cy]);
        }
        easeAll(gp, 0.2, 0.2);
    }
    // 可 / 能
    var ke = textLayer("\u53EF", 104, YEL, [W * 0.255, H * 0.36], FONT_CJK);
    var ne = textLayer("\u80FD", 104, BLU, [W * 0.255, H * 0.56], FONT_CJK);
    ke.name = "S10_Ke"; ne.name = "S10_Neng";
    ke.inPoint = t0; ke.outPoint = t1; ne.inPoint = t0; ne.outPoint = t1;
    var ok = T(ke).property("ADBE Opacity"), on = T(ne).property("ADBE Opacity");
    k(ok, 17.15, 0); k(ok, 17.41, 100);
    k(on, 17.47, 0); k(on, 17.73, 100);
})();

// =============================================================================
//  S11  19.50-22.20  风车
// =============================================================================
(function () {
    var t0 = 19.50, t1 = 22.20;
    var cx = W / 2, cy = H / 2;
    // 8 叶片: 用星形 (8 角, 尖角) 近似
    var cols = [BLU, WHT, BLU, BLK, BLK, WHT, BLU, BLK];
    for (var i = 0; i < 8; i++) {
        var l = shapeLayer("S11_Blade" + i, t0, t1);
        var g = grp(l, "b");
        // 一片: 从中心向外张开的四边形
        addPath(g, [[0, -150], [820 * 0.42, -820 * 0.42 * 0.62],
                    [820 * 0.62, -820 * 0.42], [0, -820 * 0.14]], true);
        fill(g, cols[i]);
        gpos(g, [cx, cy]);
        grot(g, i * 45);
        var rr = grot(g);
        k(rr, t0, i * 45);
        k(rr, t1, i * 45 + 26 * (t1 - t0));
        // 出现
        var sc = gscale(g);
        k(sc, t0, [0, 0]); k(sc, 20.05, [100, 100]);
        easeAll(sc);
    }
    // 白横条 + 斜十字
    var bar = shapeLayer("S11_Bar", t0, t1);
    var bg = grp(bar, "b");
    addRect(bg, 1080, 88);
    fill(bg, WHT);
    gpos(bg, [cx, cy]);
    for (var d = -1; d <= 1; d += 2) {
        var xl = shapeLayer("S11_Cross" + d, t0, t1);
        var xg = grp(xl, "x");
        addRect(xg, 1800, 76);
        fill(xg, WHT);
        gpos(xg, [cx, cy]);
        grot(xg, 35 * d);
        var xs = gscale(xg);
        k(xs, t0, [0, 100]); k(xs, 20.05, [100, 100]);
        easeAll(xs);
    }
    // 红八边形中心
    var oct = shapeLayer("S11_Oct", t0, t1);
    var og = grp(oct, "o");
    addStar(og, 8, 400, 0, 2, 22.5);
    fill(og, RED);
    gpos(og, [cx, cy]);
    var os = gscale(og);
    k(os, t0, [0, 0]); k(os, 20.05, [100, 100]);
    easeAll(os);
})();

// =============================================================================
//  S12  22.20-23.60  六角星
// =============================================================================
(function () {
    var t0 = 22.20, t1 = 23.60;
    var cx = W / 2, cy = H / 2;
    var tri1 = shapeLayer("S12_TriBlack", t0, t1);
    var g1 = grp(tri1, "t");
    addStar(g1, 3, 800, 0, 2, 0);
    fill(g1, BLK);
    stroke(g1, WHT, 9);
    gpos(g1, [cx, cy]);
    var r1 = grot(g1); k(r1, t0, 0); k(r1, t1, -15 * (t1 - t0));
    var s1 = gscale(g1); k(s1, t0, [0, 0]); k(s1, 22.80, [100, 100]); easeAll(s1);
    var tri2 = shapeLayer("S12_TriBlue", t0, t1);
    var g2 = grp(tri2, "t");
    addStar(g2, 3, 800, 0, 2, 0);
    fill(g2, BLU);
    stroke(g2, WHT, 9);
    gpos(g2, [cx, cy]);
    var r2 = grot(g2); k(r2, t0, 180); k(r2, t1, 180 - 15 * (t1 - t0));
    var s2 = gscale(g2); k(s2, t0, [0, 0]); k(s2, 22.85, [100, 100]); easeAll(s2);
    // 中心蓝六边形
    var hex = shapeLayer("S12_Hex", t0, t1);
    var hg = grp(hex, "h");
    addStar(hg, 6, 320, 0, 2, 0);
    fill(hg, BLU);
    stroke(hg, WHT, 9);
    gpos(hg, [cx, cy]);
    var hs = gscale(hg); k(hs, t0, [0, 0]); k(hs, 22.90, [100, 100]); easeAll(hs);
    // 外圈小三角
    for (var i = 0; i < 6; i++) {
        var st = shapeLayer("S12_Star" + i, t0, t1);
        var sg = grp(st, "s");
        addStar(sg, 3, 128, 0, 2, 0);
        fill(sg, (i % 2) ? WHT : BLK);
        var a = -90 + i * 60;
        gpos(sg, [cx + Math.cos(a * Math.PI / 180) * 464, cy + Math.sin(a * Math.PI / 180) * 464]);
        var sr = grot(sg); k(sr, t0, a + 90);
        var ss = gscale(sg); k(ss, t0, [0, 0]); k(ss, 22.95, [100, 100]); easeAll(ss);
    }
})();

// =============================================================================
//  S13  23.60-25.80  转场回藏青
// =============================================================================
(function () {
    var t0 = 23.60, t1 = 25.80;
    // 红场收缩
    var r = solid("S13_RedField", RED, t0, t1);
    var rp = T(r).property("ADBE Position");
    k(rp, t0, [W / 2, H / 2]);
    k(rp, 24.02, [W / 2 - W * 0.5, H / 2]);
    easeAll(rp);
    // 黄色三角 (先描边后填充)
    var tri = shapeLayer("S13_Tri", 24.55, t1);
    var g = grp(tri, "t");
    addStar(g, 3, 240, 0, 2, 0);
    stroke(g, YEL, 6);
    fill(g, [60, 200, 190]);
    gpos(g, [W * 0.30, H * 0.50]);
    var gs = gscale(g); k(gs, 24.55, [0, 0]); k(gs, 25.15, [100, 100]); easeAll(gs);
    var op = gtrans(g).property("ADBE Vector Group Opacity");
    k(op, 24.55, 100);
    // 黄条
    var bar = shapeLayer("S13_Bar", 25.15, t1);
    var bg = grp(bar, "b");
    addRect(bg, 180, 26);
    fill(bg, YEL);
    gpos(bg, [W * 0.30, H * 0.50 + 96]);
    var bs = gscale(bg); k(bs, 25.15, [0, 100]); k(bs, 25.70, [100, 100]); easeAll(bs);
})();

// =============================================================================
//  S14  25.80-30.50  几何拼贴 + π / pài
// =============================================================================
(function () {
    var t0 = 25.80, t1 = 30.50;
    var seed = 99;
    function rnd() { seed = (seed * 1103515245 + 12345) % 2147483648; return seed / 2147483648; }
    var cols = [YEL, ORG, [60, 200, 190], BLU, WHT, [150, 220, 60], RED];
    // 大件
    var bigs = [[0.115, 0.315, 264, ORG, 0], [0.205, 0.855, 236, ORG, 1],
                [0.875, 0.720, 216, [150, 220, 60], 2], [0.900, 0.220, 192, YEL, 0]];
    for (var i = 0; i < bigs.length; i++) {
        var b = bigs[i];
        var l = shapeLayer("S14_Big" + i, t0, t1);
        var g = grp(l, "b");
        if (b[4] === 0) { addEll(g, b[2], b[2]); stroke(g, b[3], 16); }
        else if (b[4] === 1) { addEll(g, b[2] * 0.62, b[2] * 0.62); fill(g, b[3]); }
        else { addStar(g, 6, b[2], 0, 2, 0); fill(g, b[3]); }
        gpos(g, [b[0] * W, b[1] * H]);
        var rr = grot(g); k(rr, t0, 0); k(rr, t1, 20 * (t1 - t0) + i * 30);
        var sc = gscale(g); k(sc, t0, [50, 50]); k(sc, 26.45, [100, 100]); easeAll(sc);
    }
    // 小件
    for (var j = 0; j < 30; j++) {
        var x = (0.06 + rnd() * 0.88) * W, y = (0.08 + rnd() * 0.84) * H;
        var sz = 46 + rnd() * 72, rot = rnd() * 360, spin = (rnd() - 0.5) * 140;
        var kind = Math.floor(rnd() * 6), cc = cols[Math.floor(rnd() * cols.length)];
        var s = shapeLayer("S14_Shape" + j, t0, t1);
        var sg = grp(s, "s");
        if (kind === 0)      { addEll(sg, sz, sz); stroke(sg, cc, 7); }
        else if (kind === 1) { addStar(sg, 3, sz, 0, 2, 0); fill(sg, cc); }
        else if (kind === 2) { addStar(sg, 6, sz, 0, 2, 0); fill(sg, cc); }
        else if (kind === 3) { addEll(sg, sz * 0.84, sz * 0.84); fill(sg, cc); }
        else                 { addRect(sg, sz * 1.2, sz * 0.4); fill(sg, cc); }
        gpos(sg, [x, y]);
        var rp = grot(sg); k(rp, t0, rot); k(rp, t1, rot + spin * (t1 - t0));
        var op = gtrans(sg).property("ADBE Vector Group Opacity");
        k(op, t0, 0); k(op, 26.45, 100);
    }
    // π + pài
    var pi = textLayer("\u03C0", 190, YEL, [W * 0.50, H * 0.54]);
    var pai = textLayer("p\u00E0i", 64, WHT, [W * 0.50, H * 0.36]);
    pi.name = "S14_Pi"; pai.name = "S14_Pai";
    pi.inPoint = t0; pi.outPoint = t1; pai.inPoint = t0; pai.outPoint = t1;
    var ps = T(pi).property("ADBE Scale");
    k(ps, 26.10, [130, 130]); k(ps, 26.70, [100, 100]); easeAll(ps);
    var po = T(pi).property("ADBE Opacity"), pao = T(pai).property("ADBE Opacity");
    k(po, 26.10, 0); k(po, 26.60, 100);
    k(pao, 26.10, 0); k(pao, 26.60, 100);
    // 角标 TEDxNingbo
    var ted = textLayer("TED", 30, RED, [W * 0.045, H * 0.055], FONT_LATIN,
                        ParagraphJustification.LEFT_JUSTIFY);
    var xn = textLayer("xNingbo", 30, WHT, [W * 0.045 + 62, H * 0.055], FONT_LATIN,
                       ParagraphJustification.LEFT_JUSTIFY);
    ted.name = "S14_TED"; xn.name = "S14_xNingbo";
    ted.inPoint = 28.10; ted.outPoint = t1; xn.inPoint = 28.10; xn.outPoint = t1;
    var o1 = T(ted).property("ADBE Opacity"), o2 = T(xn).property("ADBE Opacity");
    k(o1, 28.10, 0); k(o1, 28.55, 100);
    k(o2, 28.10, 0); k(o2, 28.55, 100);
})();

// =============================================================================
//  S15  30.50-33.00  字幕卡
// =============================================================================
(function () {
    var t0 = 30.50, t1 = 33.00;
    var a = textLayer("Motion", 42, WHT, [W * 0.36, H * 0.50], FONT_LATIN, ParagraphJustification.RIGHT_JUSTIFY);
    var b = textLayer("|", 42, WHT, [W * 0.50, H * 0.50]);
    var c = textLayer("Sound", 42, WHT, [W * 0.64, H * 0.50], FONT_LATIN, ParagraphJustification.LEFT_JUSTIFY);
    var names = ["S15_Motion", "S15_Bar", "S15_Sound"];
    var arr = [a, b, c];
    for (var i = 0; i < 3; i++) {
        arr[i].name = names[i]; arr[i].inPoint = t0; arr[i].outPoint = t1;
        var o = T(arr[i]).property("ADBE Opacity");
        k(o, 30.60, 0); k(o, 31.05, 100);
    }
    // 详细字幕
    var a2 = textLayer("Motion", 34, WHT, [W * 0.36, H * 0.50], FONT_LATIN, ParagraphJustification.RIGHT_JUSTIFY);
    var a3 = textLayer("@somei\u9EA6", 30, YEL, [W * 0.36, H * 0.50 + 40], FONT_CJK, ParagraphJustification.RIGHT_JUSTIFY);
    var x2 = textLayer("\u00D7", 34, YEL, [W * 0.50, H * 0.50 + 12]);
    var c2 = textLayer("Sound", 34, WHT, [W * 0.64, H * 0.50], FONT_LATIN, ParagraphJustification.LEFT_JUSTIFY);
    var c3 = textLayer("@\u5927\u9F13\u8BB0", 30, YEL, [W * 0.64, H * 0.50 + 40], FONT_CJK, ParagraphJustification.LEFT_JUSTIFY);
    var arr2 = [a2, a3, x2, c2, c3];
    for (var j = 0; j < arr2.length; j++) {
        arr2[j].name = "S15_Detail" + j;
        arr2[j].inPoint = 31.60; arr2[j].outPoint = t1;
        var oo = T(arr2[j]).property("ADBE Opacity");
        k(oo, 31.60, 0); k(oo, 32.10, 100);
    }
})();

// =============================================================================
//  S16  33.00-35.00  片尾 TEDxNingbo
// =============================================================================
(function () {
    var t0 = 33.00, t1 = DUR;
    var f = 150;
    // 用三个文本层精确排版 TEDxNingbo
    var ted = textLayer("TED", f, RED, [W * 0.5 - 300, H * 0.47], FONT_LATIN, ParagraphJustification.LEFT_JUSTIFY);
    var x = textLayer("x", f, RED, [W * 0.5 - 40, H * 0.47], FONT_LATIN, ParagraphJustification.LEFT_JUSTIFY);
    var ningbo = textLayer("Ningbo", f, WHT, [W * 0.5 + 50, H * 0.47], FONT_LATIN, ParagraphJustification.LEFT_JUSTIFY);
    var tag = textLayer("x = independently organized TED event", 26, WHT, [W * 0.5, H * 0.47 + 96]);
    var group = [ted, x, ningbo];
    var nm = ["S16_TED", "S16_x", "S16_Ningbo"];
    for (var i = 0; i < 3; i++) {
        group[i].name = nm[i]; group[i].inPoint = t0; group[i].outPoint = t1;
        var o = T(group[i]).property("ADBE Opacity");
        k(o, t0, 0); k(o, 33.55, 100);
        var s = T(group[i]).property("ADBE Scale");
        k(s, t0, [94, 94]); k(s, 33.70, [100, 100]); easeAll(s);
    }
    tag.name = "S16_Tagline"; tag.inPoint = 33.60; tag.outPoint = t1;
    var to = T(tag).property("ADBE Opacity");
    k(to, 33.60, 0); k(to, 34.05, 90);
})();

// ---------------------------------------------------------------- 收尾
comp.time = 0;
app.endUndoGroup();

alert("TEDxNingbo 开场片复刻已生成\n\n" +
      "合成: " + comp.name + "\n" +
      "尺寸: " + W + "x" + H + " / " + FPS + "fps / " + DUR + "s\n" +
      "图层数: " + comp.numLayers + "\n\n" +
      "提示: 若字体缺失, 请修改脚本顶部 FONT_LATIN / FONT_CJK 后重新运行。");